Returning values based on range of variable values

I'd like my code to return 1 of 3 values for a given range of values within another variable, but cannot seem to get it to work. I've tried both if statements within a for loop as well as while statements, neither of which are returning my desired result. While neither code returns any sort of error, the original variable which should hold 1 of 3 values is never defined in my workspace. Below are both of my attempts. Any help is greatly appreciated.

%For/If:

x = 0:0.01:L;

nx = numel(x);

for n = 1:nx-1

if x<=0.2

U(n,0) = 1;

elseif x == 0.2

U(n,0) = 0.5;

else x>=0.2

U(n,0) = 0;

end

end

%While:

L=1;

x = 0:0.01:L;

while x<=0.2

U(x,0) = 1

end

while x == 0.2

U(x,0) = 0

end

while x>=0.2

U(x,0) = 0

end

Answer 1

[Chendi Lin]

Hi Kevin,

The index of MATLAB starts from 1. Have you tried U(x,1)?

Best,

CD