new string+number

Dear All,
I've been receiving a lot of feed back and I would like to say thank you so much for helping me. However once I try to implement the suggested method for my real case its there's still give me an error. Hopefully u can help me with this.

Let say we already know

U1=[1 1 1 1 1];

T1=[0 1 0 0 0];

T2=[1 0 0 0 0];

T3=[0 0 0 0 1];

Now the problem should be

U2 = U1-T1; and U3 = U2-T2;
(p/s: there is no spaces between U or T with the number)
So I intend to write

for a=2:3

['U' num2str(a)] = ['U' num2str(a-1)] - ['T' num2str(a-1)]

end

I was hoping I get the answer where U2 = [1 0 1 1 1] and U3 = [1 0 1 1 0] but instead I receive an error.

??? Error: An array for multiple LHS assignment cannot contain character string.

Can you please help me? Thank you so much man.

Regards

suli Start a New Thread

Suli,

If you enter this into matlab (as you mentioned),

for a=2:3
['U' num2str(a)] = ['U' num2str(a-1)] - ['T' num2str(a-1)]
end

Matlab does not consider ['U' num2str(a)] to be a single variable name,
I think that instead, Matlab thinks that ['U' num2str(a)] is an array that contains two new variables to be defined, 1) 'U' and 2) a number converted to a string.

Thus, the way to solve the problem would be using the eval command and concatenating the strings as:

for a=2:3
eval(['U',num2str(a),' = U',num2str(a-1),' - T', num2str(a-1)])
end

Dear All,
>I've been receiving a lot of feed back and I would like to say thank you so much for helping me. However once I try to implement the suggested method for my real case its there's still give me an error. Hopefully u can help me with this.
>
>Let say we already know
>
>U1=[1 1 1 1 1];
>
>T1=[0 1 0 0 0];
>
>T2=[1 0 0 0 0];
>
>T3=[0 0 0 0 1];
>
>Now the problem should be
>
>U2 = U1-T1; and U3 = U2-T2;
>(p/s: there is no spaces between U or T with the number)
>So I intend to write
>
>for a=2:3
>
>['U' num2str(a)] = ['U' num2str(a-1)] - ['T' num2str(a-1)]
>
>end
>
>I was hoping I get the answer where U2 = [1 0 1 1 1] and U3 = [1 0 1 1 0] but instead I receive an error.
>
>??? Error: An array for multiple LHS assignment cannot contain character string.
>
>Can you please help me? Thank you so much man.
>
>Regards
>
>suli
> Start a New Thread