save all for loop data into workspace

I have a for loop, but every iteration overwrites the variable and I have only the final data left.. how can I save data from every loop the new images i am having have different matrices when i dicomread them because they are from type uint and not double saves only the last value when R=172. how do I get the other values?

for c=1:172
    name1 = strcat(folder_name1,'/',filesStruct1(c).name);
    alpha = dicomread(name1)
    R = (((double(alpha).*pi)./(4096)) - (pi./2))
    dicomwrite(R, (strcat('Results/',filesStruct1(c).name)));
end

please if somebody can help me by editing that on my code, I am kind of using matlab since a few months thanks in advance

Answer 1

[Bob Thompson]

Easiest way to do this is with indices within your code. Instead of having R be the value you are writing, you want to write R(c), or R{c} depending on the type of data R contains. The first is for a regular double array, while the second is for a cell.

for c=1:172
  name1 = strcat(folder_name1,'/',filesStruct1(c).name);
  alpha = dicomread(name1)
  R(c) = (((double(alpha).*pi)./(4096)) - (pi./2))
  dicomwrite(R(c), (strcat('Results/',filesStruct1(c).name)));
end

Answer 2

[Geoff Hayes]

tarek - use a cell array to store the data (R) on each iteration of the for loop. For example,

 myImageData = cell(172,1);
 for c=1:172
    name1 = strcat(folder_name1,'/',filesStruct1(c).name);
    alpha = dicomread(name1)
    R = (((double(alpha).*pi)./(4096)) - (pi./2))
    dicomwrite(R, (strcat('Results/',filesStruct1(c).name)));
    myImageData(c) = R;
end

Once you have iterated over all 172 images, then the myImageData cell array will have the R from each iteration.