Error on REPMAT PROBLEM

Can anyone tell me what is this error:

Error using repmat
Replication factors must be a row vector of integers or integer scalars.
Error in simple_example (line 15)
beta(1:N*0.3,:)=repmat([0.5 -0.5],N*0.3,1);

My N= 85, T=51 , X= X1, X2, X3,

Answer 1

[Star Strider]

The arguments designating the dimensions to be replicated must be integers. It is not possible to replicate a fraction of a dimension.

The same applies to your column subscript for ‘beta’.

Use floor, ceil, or similar functions to create integers from the calculations that now result in fractions.

[Saptorshee Chakraborty]

Thank you very much, I will try

[Star Strider]

My pleasure.