Using TriScatteredInterp with 3 known data points

I am working on making a visualization program to look at time series data. I am currently trying to use TriScatteredInterp to look at the interpolated data in a 2-d plane with 3 known points at each time step. I have set up a meshgird in the shape of a square that covers the area when my known data is. My data points are in the shape of a triangle, and there location stays constant throughout time. The issue I am running into is

??? Error using ==> TriScatteredInterp Input data point locations have invalid dimension.

From what I can tell so far is that I am improperly feeding the data into TriScatteredInterp.

Here is my code for the TriScatteredInterp for loop

for i=1:insizer;
    data=TriScatteredInterp(x,y,INFILE(i,:));
end

insizer represents the number of rows in my input data. x and y are files that I have inputted with the coordinates. Each data point has a corresponding x and y. INFILE is the data file which is a matrix 3 columns by 2537 rows.

So the question that I have is what is the best way to feed the data into TriScatteredInterp? Or should I be using a different function?