The for loop doesn't iterate

Question

In MATLAB the following for loop:

for i = [1:100]\' 
    %\'// Do something, such as disp(i)
end

isn\'t apparently really impl

Answer 1

If you write

for i = (1:100)' %'# square brackets would work as well
   doSomething
end

the loop is executed only once, since a for-loop iterates over all columns of whatever is to the right of the equal sign (it would iterate 200 times with a 100-by-200 array to the right of the equal sign).

However, in your example, you have i=[1:100], which evaluates to a row vector. Thus, the loop should execute 100x.

If you iterate over an array that might be nx1 instead of 1xn, you can, for safety reasons, write:

for i = myArray(:)'  %'# guarantee nx1, then transpose to 1xn
end

Answer 2

This is not correct. The code:

for i=1:100
    disp(i)
end

will print all the values 1 through 100 consecutively. While Matlab does encourage vectorization, you can definitely use traditional loops with the style of coding you used above.