How I sum to matrix wich one is the mean of the value and the other the standard deviation?

you certainly know that a value in order to be defined correctly it must be defined by its mean plus or minus its standard deviation:

VALUE= MEAN ± STANDARD DEVIATION

Now, I have a matrix for the mean (meanbasket) and a matrix for the standard deviation (devstdbasket).

How can I obtain the matrix of the value?

Answer 1

[Matt J]

I this what you mean?

[m,n]=size(meanbasket);

value=meanbasket+randn([m,n]).*devstdbasket;

[HelpAStudent]

No, it's not. Because I have the value of both the matrix (I don't want random values): the matrix who's the value are from the standard deviation have also the problem to change size on every loop. So I also should have them preallocating for speed.

[Matt J]

It's not at all clear what you're trying to calculate. If you're just trying to compute the upper and lower bounds mentioned in your original post, then you obviously know already what operations are required because you yourself posted equations for them.

upperBound=meanbasket+devstdbasket;
lowerBound=meanbasket-devstdbasket;