How to show symbolic object in uitable?

How can I show symbolic object in uitable?

syms i2,i3 'real';

a=[ 0 0 -i3; 1 2 3];

a(2,2)=-i2;

set(handles.uitable2, 'Data',a);

Answer 1

[Walter Roberson]

You cannot show symbolic objects in a uitable. In uitable, you can only show numbers and text. You can find the text representation of a symbolic object by using char() on the object. But remember, that will return text, not a symbolic object, so you will not be able to use the text as a symbolic object.

[john]

Thank You,

So:

1. How can I convert symbolic object ( or in my case system of equations) to char type, for uitable? Or how can I find text representation of a symbolic object?

I used command a(i,j)=findsym(UserData.maticaA{i,j});

but I got this mistake: Undefined function or method 'findsym' for input arguments of type 'char'.

Here is result of real task created with M-file:

s =

(Vo + Io*R3*alfa)/(R1 + R2)

(Vo + Io*R3*alfa)/(R1 + R2)

-(Vo + Io*R3*alfa)/(R1 + R2)

-Io

-Io

Io - (Vo + Io*R3*alfa)/(R1 + R2)

(R1*(Vo + Io*R3*alfa))/(R1 + R2)

-Io*R3*alfa

-(R2*(Vo + Io*R3*alfa))/(R1 + R2)

-Io*R3

Vo + Io*R3

Vo

(R1*(Vo + Io*R3*alfa))/(R1 + R2)

(R1*Vo - Io*R2*R3*alfa)/(R1 + R2)

Vo

Vo + Io*R3

So I have to show this in GUI.

2. Exist other way, how can I show result without uitable?

[Walter Roberson]

You can find the text representation of a symbolic object by using char() on the object.

Example:

syms x y

f = x^2 + 3*x*y + 2;

char(f)

To convert text to a symbolic object, use sym()

For example

f = sym('x^2 + 3*x*y + 2');

Once you have it in symbolic form, you can extract the names of the variables that occur in the expression using symvar(). For example

symvar(f)

would return the symbolic names x and y . Depending on context, you may want to char() the result.

Warning: "symvar does not consider the constants pi, i, and j to be variables."

[Walter Roberson]

Can you show the result without a uitable? Sure. You could text() it in to place, or you could create a uicontrol('Style','text'), or a uicontrol('Style','edit')

[john]

for this case

syms i2,i3 'real';

a=[ 0 0 -i3; 1 2 3];

a(2,2)=-i2;

how can I show matrix a in uicontrol('Style','text')

[Walter Roberson]

uicontrol('Style','text', 'String', cellstr(char(a)) )

(You will want to add a Position parameter in to that of course.)

If you use instead use 'Style', 'edit', be sure to set 'Max' to at least 2. Another hint is if you want non-editable text but you want it to be vertically scrollable, then instead of using 'Style', 'text', use 'Style', 'edit', 'Max', 2, 'Enable', 'disable'

[john]

Big Thank You Mr. Walter Roberson,

cellstr(char(a)) is the best command ever :-).

Thank You so much again

Now my program works great, I put in uitable "symbolic object", and than I show "symbolic object" in other uitable