Problem regarding my function

Here I was trying find out various values of created functions for values of t. But there seems to be an error please help.

The error,

"Array indices must be positive integers or logical values.

Error in nana>myfunc1 (line 20)

er = e(i);

Error in nana (line 6)

a = myfunc1(fs*t + 1);"

My code:

f = 200;

fs = 100*f;
t = [0:1/fs:40];

a = myfunc1(fs*t + 1);
b = myfunc2(fs*t + 1);

disp(a);
disp(b);

plot(t,a,t,b)
function er = myfunc1(i)

f=200; %frequency of the impulse in Hz
fs=f*100; % sample frequency is 10 times higher
time=0:1/fs:40; % time vector
e=zeros(size(time));
e(1:fs/f:end)=1;
er = e(i);
end

function edotr = myfunc2(j)

f=200; %frequency of the impulse in Hz
fs=f*100; % sample frequency is 10 times higher
time=0:1/fs:40; % time vector
e=zeros(size(time));
e(1:fs/f:end)=1;
edot = diff(e);
eedot = length(time);
eedot = edot;
eedot(length(time)) = edot(length(time) - 1);
edotr = eedot(j) ;
end

Answer 1

[Cris LaPierre]

You have an indexing problem. You input to myfunc1 is used to index e. Your calculate it as fs*t + 1. The result is a 1x800001 vector of numbers, and only every 200th number is an integer. You can't use decimal numbers to index an array.

e=1:5;
% Correct
e(2)

ans = 2

% Incorrect
e(2.3)

Array indices must be positive integers or logical values.