Showing posts with label cas. Show all posts
Showing posts with label cas. Show all posts

HP 50g Graphing Calculator (F2229AA#ABA) Review

HP 50g Graphing Calculator
Average Reviews:

(More customer reviews)
It's 10/5/06 and I'm editing this review right up front with the first paragraph, because this little calc has a problem that I hadn't noticed initially. The new HP keys, as I describe below, are great. They have a solid click and a good rollover ability - meaning that you can push the number 1, then push the number 2 before letting go of the 1 entirely, and you'll still get "12" on the screen. That's perfect. Here's the downside: Rapidly enter the number "1100." Click-click-click-click. And yet my screen says "10." Why? Because a rapid double-click of a numeric key results in the calculator noticing only the first click. If a typewriter worked that way, I'd be attending metings every day instead of meetings.

**UPDATE - 10/14/06** One of the commands available, not documented in the 50g material, but documented for several earlier HP calculators, is a KEYTIME command. Quite simply, replacing the default keytime with "500" eliminates missed keystrokes. This corrects the problem I described above.

And now back to my original review:

First, the keypad issue has been addressed with this model, and each key has a feel that is similar to the HP41 - just about perfect for data entry without needing to look at the keypad. Now all that's necessary is for HP to return to the complex keys that allowed for print both on the top surface and the beveled edge; that would allow for some improvement in the user interface. But overall this is a major step forward from the HP49 line.

Next, the display is bright and legible with good contrast. These multiline displays still aren't quite as good as the single line displays from years past in terms of visibility at odd angles but we're coming close. There's plenty of information here with a seven line stack in the default mode.

The manual is where the calculator loses a star. While the new manual is an improvement over the HP48/49 series (though it has less information, it is more understandable), it is nowhere near as complete and useful as the HP41 series manuals were. HP needs to bring back a well-written manual series with use of color, high-end paper, and quality typesetting. For example, the calculator comes with a user's manual; on page 1-20, it says that additional references can be found in Chapter 1 and Appendix C of the calculator's user's guide. What user's guide? They don't mean the manual since that doesn't have any Appendices (or an index, for that matter). Where would I get the user's guide? Then I discover that it is included, and is on the CD-ROM in pdf form. Apparently it is a larger version of the user's manual, with additional information, including an index. Much of the information in the Guide is duplicated from the Manual - but we still don't have complete programming and functional command discussion. Don't get me wrong - everything you need for standard operations is here; but if you really want to get into the capabilities of the calculator (and that's why you're spending $129, right?), we want the full manual. Oh, and bring back the manuals that are spiral-bound so we don't have to weigh the book down with something each time we turn to the calculator to try something.

Here too is a connectivity kit of software, none of which runs on my Mac. I tried plugging it in to the Mac using the standard USB connecting cable (included) but nothing happened. Since I didn't buy the HP with any need to hook it up to my Mac, it's not a problem, but what good is connectivity if noone bothered with the Mac software?

There are a few little nits that still need to be picked. For example, the stack is right justified but data entry is left justified. It is much easier to quickly review an entered number and compare it to numbers on the stack if they are similarly justified. The enter key needs to return to double-width just above the numeric portion of the keypad, and HP should finally pick a standard numeric/operator layout and stick with it. The HP41 had the major operators on the left. The HP48 put them on the right and changed the sequence. The HP50 keeps them on the right but bumped them all up by one key. For those of us who essentially touch-type on calculators, this relearning is a pain.

I must admit that if HP simply rebuilt the HP41C series with more memory, they'd have a clear winner. And given the prices that those models sell for on eBay in new condition, HP could clearly do well with such a product.

The connectivity issue would have cost another star, but the overall build quality, computing capabilities, programming capabilities, and incorporation of RPN on the 50g make it clearly worth 4 stars.

Click Here to see more reviews about: HP 50g Graphing Calculator (F2229AA#ABA)

Product Description:
The new HP 50g Graphing Calculator provides optimum power, flexibility and connectivity for math, science, and engineering professionals, as well as college students. Featuring a more capable SD card slot, 2.5 MB total memory (512 KB, 2 MB Flash ROM), RS232 and USB connectivity, and a built-in intelligent editor,

A large, high-contrast display clearly shows every important part of a formula, calculation, or graph.

The 50g boasts expansive memory, thanks to an SD card slot. View larger. this system gives you more capabilities than ever before. Compact, portable, and simple to operate, the 50g features a 30 percent increase in usable space over the HP 49g, and handles complex computations with ease.
Powerful, Innovative Design For Fast, Accurate Computation
The 50g features easy-to-use, powerful tools that students and professionals can rely on for years of performance, including built-in graphing functions, constants, and applications. This calculator also offers built-in lessons and step-by-step problem solving examples to help illustrate abstract concepts. Choose between efficient RPN (Reverse Polish Notation), Textbook, or Algebraic data entry and rest assured that expansive memory (with SD card slot) means the 50g can handle even the most complex calculations. Graphing features include 2-D function, polar, and parametric plot, as well as 3-D, differential equation, and bar plot.
The 50g's large, high-contrast display with adjustable font type and size clearly shows every important part of a formula, calculation, or graph so you'll be able to clearly read and analyze your results. In addition, you can isolate and evaluate sub-expressions using the intelligent editor, while also cutting, pasting and copying objects as needed. Finally, the large equation library and over 2,300 built-in functions make this calculator ideal for both professionals and students.
What's in the Box
50G graphing calculator, batteries, user's manual, CD (connectivity software and advanced user's guide), USB cable, and premium pouch.

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TI-Nspire CAS Graphing Calculator Review

TI-Nspire CAS Graphing Calculator
Average Reviews:

(More customer reviews)
This is a calculator with tons of potential, however it is not nearly as user friendly as every other TI graphing calculator is.I'm an AP Calculus teacher and ordered one of these through school funds to test out.It can do everything that the TI-89 does and has much more potential than the TI-89, but the thought of teaching my students to use one of these just scares the bejesus out of me.

Pros:
1. Large screen with good resolution.
2. little green letter buttons make it easier to enter commands.
3. WYSIWYG typing means you don't have to remember calculator syntax.It's much easier to enter a definite integral or limit.
4. Graphing window allows you to graph rectangular, polar, and parametric equations simultaneously.
5. Click and drag feature on the graph screen is nice.

Cons:
1. The letter buttons are always in the way while I'm trying to enter numbers.
2. Screen can be difficult to read.
3. There is not a model that hooks up to a TI presenter.It does come with software where you can use a computer version of the calculator (assuming you have an LCD projector), but it's much slower than simply hitting actual buttons.
4. Finding max, min, roots, and intersections takes longer than on the TI-89.
5. When you do find the things from my #4 con, the calculator displays them right in the middle of the graphing screen, so you have to click and drag them out of the way to continue viewing the graph.
6. The "y=" screen is included as part of the graph screen, taking up graphing space.
7. Viewing a function table isn't difficult, but I can't figure out how to view a window containing ONLY the function table.It splits the screen with the graph on the left and the table on the right.This keeps you from being able to see several function values at the same time.Also I can't figure out how to close the table. I'm sure there's an easy way, but due to the completely inadequate user manual I have no idea what it is.
EDIT: I figured out how to view a function table on a different page/tab in the calculator, so the split screen problem is solved and it's much easier to close the function table.It still is not very intuitive at all and if I weren't very tech savvy I'd have never figured it out.
8. I have yet to find a differential equation graphing mode, and internet searches lead me to believe there isn't one.Why in the world would TI include this with the TI-89 and not with their new, supposed top-of-the-line model?

I may edit this as I find more pros or cons.I've had this calculator for 3 or 4 months and I do get it out on occasion to give it another shot, but each time I'm just as disappointed as the last.I keep think it just has a steep learning curve and I'll eventually catch on but it's not happening.That being the case, I have a feeling that if I tried to get my students to use this calculator I would be spending too much time just teaching them to use it.

If this calculator was only $50 and the TI-89 Titanium stayed at about $150 I'd still encourage my students to get the 89.

Click Here to see more reviews about: TI-Nspire CAS Graphing Calculator

Product Description:
The TI-Nspire CAS handheld and computer software has all the functionality of TI-Nspire technology plus built-in CAS (Computer Algebra System) capabilities. Explore, evaluate and simplify expressions, numeric problems and variables symbolically. Experience all the functionality of TI-Nspire technology plus built-in CAS capabilities, which provides the ability to explore, evaluate and simplify expressions, numeric problems and variables symbolically. The TI-Nspire CAS handheld does not include the snap-in TI-84 Plus Keypad, which is compatible exclusively with the TI-Nspire handheld.White box.

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Texas Instruments TI-NSpire Math and Science Handheld Graphing Calculator Review

Texas Instruments TI-NSpire Math and Science Handheld Graphing Calculator
Average Reviews:

(More customer reviews)
Strengths:

The document management system -- multiple "problems" can be kept in the calculator at the same time, and each problem keeps its own variable names; good graphing capabilities; ability to split the screen and work with multiple views of the same problem; spreadsheet application.The calculator has 5 "applications" (calculator, graphs & geometry, spreadsheet, data & statistics, notes), and information can be shared between them.

Weaknesses:
The documentation is very poor.There are two user guides, with considerable overlap in the contents.In User Guide Part 1, which comes packaged with the calculator, there are 25 pages on the Graphs & Geometry application, and the information on how to actually plot a graph is barely mentioned.User Guide Part 2 comes as a PDF file, and has more detail, but is badly organized and missing a lot of information.For example, instructions for a number of operations say to "drag" something, but nowhere in the manual does it say how to do that.

Keypad: other reviewers have commented on the difficulty pressing the right buttons on the keypad.Even worse is the "mouse" operation.I finally discovered that dragging involves holding the center "Click button" while pressing the arrow keys on the "NavPad".It is very difficult to control the cursor with the NavPad, and doubly so when trying to hold down the click button.Also, what operation is done by a click or drag is dependent on where on the screen the cursor is, and it's difficult to control the cursor location with the level of precision needed.

TI-84 compatibility: This seemed like a great idea.However, as far as I can determine, there's no way to integrate TI-84 functions with TI-Nspire functions.When you put in the TI-84 keypad, you get a TI-84.With the TI-Nspire keypad, you get a TI-Nspire.If you want to transfer information from one to the other, it seems to be impossible.The only relevant information in the documentation about TI-84 mode is a warning that if you update the operating system, all your added TI-84 applications will be deleted.

Lack of software: The TI-84 has a lot of user-contributed software.There's almost nothing on the TI web site for the TI-Nspire.I also didn't find much with a web search, and some of what is available requires the CAS version.For example, there don't appear to be any built-in physical constants or conversion factors for units.I could switch to TI-84 mode and get them, but then what's the point of buying the TI-Nspire?

Summary:

This calculator does not appear to be well-engineered or well-supported by TI.I would recommend waiting to see whether they give it the support that it deserves.

Click Here to see more reviews about: Texas Instruments TI-NSpire Math and Science Handheld Graphing Calculator

Product Description:
The TI-Nspire handheld comes with a snap-in TI-84 Plus Keypad that provides the same keystrokes as TI-83 Plus, TI-84 Plus and TI-84 Plus Silver Edition graphing calculators. Whether handhelds are provided by your school or your students bring in personally-owned units, this side-by-side compatibility between TI-Nspire handhelds and existing TI graphing calculators delivers a comfortable transition to TI-Nspire technology.Inclueds USB cable for software and file downloads.

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Texas Instruments Voyage 200 Calculator Review

Texas Instruments Voyage 200 Calculator
Average Reviews:

(More customer reviews)
The actual calculator itself is stunningly powerful.It is faster than the TI-92, the full keyboard makes it easier to work with than the TI-89, and the ability to solve, factor, work with imaginary numbers, give exact answers, as well as do all of these things symbolically, plus the amazing applications included (a version of Geometer's sketchpad!), make this the best calculator made by TI.
Just beware that some standardized tests and some teachers will not let you use this calculator.
The biggest drawback is the documentation that is supposed to help you utilize the power of this calculator.There really isn't any.There's a short manual that's included in the box, but it only gives you the broad overview of how to put the batteries in and how to turn it on and off.
To find any information on how to, say, type something in that you want to factor, you have to load up the cd-rom, and hunt around on that thing to find the information you want.
Why don't they include all of this documentation along with the calculator in an actual book form?(Okay, so I know the answer to that - it saves money for them.)
It's a huge hassle - if I'm at class, or work and want to be able to use some function, I have to wait to figure it out until I can get home and load up the cd-rom, find the right page, etc....not to mention that the documentation on the CD-rom isn't that helpful either.There's lots of discussion of stuff, but it is very hard to understand.
A great calculator, but awful documentation that makes learning how to use all of its powerful functions frustrating and annoying.

Click Here to see more reviews about: Texas Instruments Voyage 200 Calculator

Product Description:

MODEL- TIVOYAGE200VENDOR- TEXAS INSTRUMENTS

FEATURES- Voyage200 Personal Learning Tool
Combines the functionality of the TI92PLUS with the added benefit of
3x more Flash ROM memory and improved interface. Complete with a
built-in QWERTY keyboard a Computer Algebra System (CAS) and
"Pretty Print" which shows mathematical expressions the way they
are traditionally written.
Voyage200 has 8 pre-loaded software applications including the
Geometers Sketchpad Cabri Geometry and more! MANUFACTURER WARRANTY:.

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