Replication factors must be a row vector of integers or integer scalars.

My coding is

depth = [0.01 1.5:1.5:30]';

w = 10 - 0.5 .* depth;

w(w<0) = 0;

a=829862;

b=21

c=a/b

W = repmat(w,c,1);

The result is replication factors must be a row vector of integers or integers scalars

Does any one can help me?

Answer 1

[Alex Mcaulley]

c must be an integer. Then, a solution:

depth = [0.01 1.5:1.5:30]';
w = 10 - 0.5 .* depth;
w(w<0) = 0;
a=829862;
b=21
c=round(a/b)
W = repmat(w,c,1);

[Skydriver]

Thank you it works know

[Alex Mcaulley]

Then, accept the answer to close the question please

Answer 2

[Steven Lord]

If you want to replicate w so it has exactly a elements, I recommend doing two things. Let's operate on some very simple sample data.

w = 1:21;

While I would call your a variable something like desiredLength to make its purpose obvious, I'll use your variable name for this example. Similarly I would call b something like wLen.

a = 829862;
b = length(w);

The length function is good if you know its input is a vector. If you're not sure and need to know how many elements the input has use numel instead.

Using the ceil function ensures that b*multiplesNeeded is at least a. This means when replicatedW is created on the second line below it has at least a elements. Then the third line trims the excess elements (no more than b-1.)

multiplesNeeded = ceil(a/b);
replicatedW = repmat(w, 1, multiplesNeeded);
replicatedW(a+1:end) = [];