How to set the data from file

I have some data saved as .dat file from 1sec to 3600sec. I would like to read this data in simulink. Then I write the code to read the file and its work perfectly. The code is:

indata=load(file name)

time=indata( : , 1);

d=indata( ; , 2)

...

The problem is the time of file is from 1sec, I would like to put time 0 before the first second. for example the file is:

1 0.3 1.7

2 0.5 0.9

...

3600 X X

so how to write the code to add: 0 0 0 before 1 0.3 1.7 in Matlab and then run the simulink.

Answer 1

[dpb]

ndata=load(file name)
ndata=[zeros(1,size(ndata,2); ndata];  % prepend row of zeros
time=indata( : , 1);
...

Note the use of zeros() and size(ndata) -- this will be consistent w/ a different number of columns in the input file if that were to change rather than just writing

ndata=[[0 0 0]; ndata];  % prepend row of zeros

or using a hardcoded '3' in the zeros() argument.