Reading a text file into a function as variables

I have a file with 6 columns of numerical data, tab delimited:

Eg.  1   2   3   4   5   6
     7   8   9   10  11  12
     13  14  15  16  17  18
     etc.....

I have a function called gpoly which requires the following inputs:

g=gpoly(x0,z0,xcorn,zcorn,ncorn,rho)

Where all these inputs are numbers. I would like to run this function using each line of my data file as these 6 inputs each time to produce a list of g's at the end.

Could someone please explain how would be best to do this? I have tried readtable and rowfun which did not work. Possibly a for loop iterating over each line, but I am not sure of the syntax in Matlab?

Many thanks, Lily

Answer 1

[Guillaume]

For completeness:

D = dlmread(somefile);

Then, if gpoly works on arrays:

args = num2cell(D, 1);
g = gpoly(args{:});

If it only works with scalar:

g = zeros(1, size(D, 1)); %edited for silly mistake
for row = 1:size(D, 1)
   args = num2cell(D(row, :));
   g(row) = gpoly(args{:});
end

[Lily Muller]

Many thanks for the answers. I have tested and gpoly can only work on scalars so I have tried using the code you provided:

g = zeros(1, row);
for row = 1:size(D, 1)
   args = num2cell(D(row, :));
   g(row) = gpoly(args{:});
end

However I get an error in the following line:

g = zeros(1, row);

Error: Undefined function or variable 'row'.

Thanks, Lily

[Guillaume]

yes, sorry made a mistake. Editing the answer now.

Or you could just have ignored the line, that just predeclare g.

Answer 2

[Iain]

 dlmread

That's a function that is designed to read delimited files into matlab. - It'll likely give you an array with all the data in it, ready to use.

You could try using the import wizard instead though.