Unrecognized function or variable 'row'.

% exampleProgram.m
%
% This program produces an mx1 array of angles named
%of degrees and an mx1 array of the sines of the angles
 %named sineAngle.
for angle =0:pi/10:2* pi
degrees (row, 1) = angle*180/pi;
sineAngle( row, 1 ) = sin (angle);
 row = row +1; 
end
% last line

Unrecognized function or variable 'row'.

[SALAH ALRABEEI]

your iterating variable is named "angle" not "row",

Answer 1

[KSSV]

row = 0 ; 
for angle =0:pi/10:2* pi
     row = row +1;
    degrees (row, 1) = angle*180/pi;
    sineAngle( row, 1 ) = sin (angle);
 
end

But preferred is below code:

angle =0:pi/10:2* pi ; 
n = length(angle) ; 
degrees = zeros(n,1) ; 
sineAngle = zeros(n,1) ; 
for i = 1:n     
    degrees (n) = angle(i)*180/pi;
    sineAngle(n) = sin (angle(i));
 
end

Alos you can vectorize it. No loop needed.

angle =0:pi/10:2* pi ; 
degrees = angle*180/pi;
sineAngle = sin (angle);