Help with a for loop and matrices

I currently have this code where SizeChem is a 24x7 matrix and newcolum is a 24x1 matrix.

newcolumn = sum(SizeChem,2);

for i = 1:length(SizeChem)
   
    T(i) = sum(newcolum(1:i,1));
    
end

I am wanting to create some arrays or variables that are the sum of the new column but summing one more row than the last. Then I want to take all those individual values and put them back into a matrix (24x1) starting with T{1} thru T{24}. I am also getting the error:

Undefined function or variable 'newcolum'.

Error in Analysis_plots (line 26)
    T(i) = sum(newcolum(1:i,1));

I am not sure why this is. Thanks for the help in advanced.

Answer 1

[Rajat Gupta]

It should be newcolumn instead of newcolum in your loop body.