Hi Kyle,
In the above code you are trying to use the variables "R" and "C" as the functions to create a matrix of dimensions of R and C. However, these are not functions but variables with user-defined values.
To create a matrix of random numbers of above dimensions you can pass the dimension values to the "randi" function itself.
%Let the values of R,C be 3,4
R=3;
C=4;
MAT= randi([-10 10],R,C)
And to find the count of negative numbers.You can either loop through each element of the matrix and check for the value or you can apply a boolean matrix operations and count for all the valid elements. Following example shows both the methods
%Method-1 Iterate through each element
negCount=0;
for i=1:R
for j=1:C
if(MAT(i,j)<0)
negCount=negCount+1;
end
end
end
negCount
%Method-2 Matrix boolean operation
%Generating a boolean matrix on condition whether the element is less than zero or not.
negCount=nnz(MAT<0) %nnz - gives number of non zero elements in the matrix.
To learn more about randi with these arguments and nnz function, refer to the following documentation:
- https://www.mathworks.com/help/matlab/ref/nnz.html
- https://www.mathworks.com/help/matlab/ref/randi.html?s_tid=doc_ta#buf2dpy-7
I hope it helps!.
