341 replies to this topic

[vanhoa]

Yes, roots are easy, how about min max funcs?

Btw, OS3's fmin(),fmax() func are really improved, we can obtain the result not numeric but in algebraic!

[PAP]

Yes, roots are easy,

Incorrect, again: finding roots of functions of two independent variables is not an easy task; it's very complicated, compared to the simpler case of functions of one variable.

how about min max funcs?

Finding minima or maxima is directly related to finding roots, so it's equally difficult.

[Lovecasio]

Yes, roots are easy, how about min max funcs?

Btw, OS3's fmin(),fmax() func are really improved, we can obtain the result not numeric but in algebraic!

Để biết th?m th?ng tin về h?m nhiều biến, em c? thể tham khảo cuốn "To?n học cao cấp - Tập 3" của Bộ GDĐT, d?ng cho sinh vi?n c?c trường khối khoa học kỹ thuật. N? tr?nh b?y tương đối đầy đủ về h?m nhiều biến (vi ph?n ri?ng, đạo h?m ri?ng, vi ph?n to?n phần, t?ch ph?n nhiều lớp, v? c? th?m phần phương tr?nh vi ph?n nữa). Gi? khoảng mười mấy ng?n, kh?ng đắt lắm . Ah, h?nh như c? cuốn về "C?c phương ph?p số - Numerical Analysis" nữa, nếu em muốn t?m hiểu th? c? thể mua th?m để tham khảo.

In English: For more information about multiple variable function, you can read the book "Advanced Maths - 3rd", the price is about 1$.

[vanhoa]

Em mua cuốn đ? l?u rồi:p, em ko c? ? n?i l? ko biết m? chỉ l? để xem pap c? biết ko th?i:d

[Lovecasio]

Nếu thấy cuốn đ? c?n chưa thoả m->n sự t? m? của em th? em c? thể tham khảo th?m bộ s?ch "To?n cao cấp" của trường ĐHBK TPHCM. Cuốn 1 m?ng d?nh ?, c?n cuốn 2 th? kh? d?y v? kh? nhiều thứ. PAP c? thể hiểu s?u về to?n n?n chắc sẽ biết mấy vấn đề m? em n?i tới.
Uh, em thử tr?n CP của em xem: fmax(sin(x)^2-sin(x)-2) v? fmin(sin(x)^2-sin(x)-2), kết quả thấy lạ lắm.

[Colombia]

I would like to for the next Classpad:

1. Without bottons. Just one (turn on and turn off). The next CP will be smaller.

2. On Basic i would like to see a function, as Input, with multiples input data on the same window. I mean, when the user uses the input function he/she just can input one data, i would like multiples datas on the same input window.

3. The option to increase the memory.

4. When the user delete accidentally his/her expressions on main, the undo/redo option on Edit doesn?t work.

5. The User functions created on program will be better if the user can handle it as Interactive mode, i mean when the user uses a function will be appear a window ask him/her the parameter to run the function. Right now the user have to memorize the order of the parameter of the function

6. A battery as an ipod that the user can recharge on the USB port.

7. I think the user can?t manipulated data on Spreadsheet from Basic

8. A virtual botton with engineering notation as FX algebra 2.0

9. The possibility to created a folder into another folder, just one folder more

[qwerty841]

1. Without bottons. Just one (turn on and turn off).

how about a fingerprint or retina scanner so nobody else can use it?

3. The option to increase the memory.

maybe a usb port to hook up a 300gb external hard drive

or maybe the keyboard could be taken out and replaced by a handwriting recognition area.

[Colombia]

how about a fingerprint or retina scanner so nobody else can use it?

The CP300 it is a calculator not a Mission Impossible Computer

[Hobart]

Yes, you're right!
I use the Classpad very much (I think I'm not the only one... ) and so the votage of my batteries gets down very quickly.
I would like to have a big, fat accumulator instead of te four batteries. So we could use this calculator longer without changing them.

[sry, bit confused English ]

[far2055]

1. Without bottons. Just one (turn on and turn off). The next CP will be smaller.

Ohh. no! changing '-' key to 'shift' key and let user configure the keys is one of the best things ca$io did in OS 3.0. The keyboard is really useful and make data input process very fast and easy. It is really hard work to switch between virtual key pads for every function.

5. The User functions created on program will be better if the user can handle it as Interactive mode, i mean when the user uses a function will be appear a window ask him/her the parameter to run the function. Right now the user have to memorize the order of the parameter of the function

It is good to have both type. I mean when user write function name without any parameters then a window appears and ask him/her the parameter to run the function.

6. A battery as an ipod that the user can recharge on the USB port.

Great Idea. A built-in USB charger is great.

[Static]

I would like if the classpad supported quaternion math..

[calcus]

Hi I am looking for a site with programs to download for the classpad 330 calculator, thanks for your help



Calculadoras Casio Class Pad 330

[DavidH]

Log-Log Scale on ALL graph plots, especially Scatter plots would be very, very useful.

Edited by DavidH, 22 January 2011 - 01:39 AM.

[amindanial]

Solve () must be modified to accept initial solution guess when solving a system of nonlinear equations. I came up with this suggestion when I tried to solve the following system of equations using CP 400 but it couldn't, while it was easily solved  on Xcas using fsolve providing an initial guess.

((1 / 24 * π) * cos(((1 / 180 * θ1) * π))) + λ=0

((7 / 120 * π) * cos(((1 / 180 * θ2) * π))) + λ=0

((7 / 72 * π) * cos(((1 / 180 * θ3) * π))) + =0

θ1 + θ2 + θ3 - 360=0

[KUEI]

StrJoin is WAAAAAAAY too limited. Only being able to join 2 strings at a time is a huge headache. Please do what Ms Excel does with the ampersand.

 

NumToStr would be better if we could use Norm or other number forms for output.