Uitable- symbolic variable

Hi,

I want use uitable, and uitable should present matrix named for example a. I need insert numbers ” 1, 2, 3,…” and strings “a, b,c,….” to the table.

At the end I need result b=a*a.

Please, help mi.

PS:

Here is example in M-file. i3 = sym(‘i3′,’real’); a=[ 0 0 i3; 1 2 3]; b=[2 2; 2 2; 2 2]; c=a*b;

But I need something like this in GUIDE.

Answer 1

[Walter Roberson]

I am not clear on what you are asking to do. Are you asking to be able to write symbolic formula in to the cells, and evaluate the formula represented by the cells?

If so, and if each symbolic variable has an associated actual value (or list of values), then you can use vectorize() and str2func() to convert the text strings in to anonymous functions that you can then pass the relevant values in to. (If you want to build an Excel replacement, you will likely find bsxfun() or ndgrid() to be useful.)

If, though, one or more of the symbols might not have an associated actual value and you want the result to be computed with numeric values used when possible and symbols used where appropriate, then you are going to have to write your own symbolic expression handler (or find one that someone has already written.)

[john]

Hi,

at first: I insert numer of columns 'm' and rows 'n'. Then I create a matrices A=zeros(m,n). Then I put matrices A to Data of the table set(handle.uitable, 'Data',A). If I put the number to the table, everyting is OK.

So I have problem now:If I put for example "a" to the table, then apears NaN. So , How can I put "a" to the table?

At an the end, I need multiply matrices(tables) like A*A. Everyting is OK, if I insert number, but it doesn't work with char.

Could I send you my program? Do you have an email adress?

vansac

[john]

Hi,

at first: I insert numer of columns 'm' and rows 'n'. Then I create a matrices A=zeros(m,n). Then I put matrices A to Data of the table set(handle.uitable, 'Data',A). If I put the number to the table, everyting is OK.

So I have problem now:If I put for example "a" to the table, then apears NaN. So , How can I put "a" to the table?

At an the end, I need multiply matrices(tables) like A*A. Everyting is OK, if I insert number, but it doesn't work with char.

Could I send you my program? Do you have an email adress?

vansac

[john]

Sorry, number of columns and rows

[Walter Roberson]

You will have to change all of your cells to be text, and expect text representation of numbers. str2double() of a string will return empty if the string does not represent a pure number.