Entering PGFplots data as a table of smoothing the function contourplot

I'm currently trying to make a plot of the function f(x,t)=exp(-((x)^2)/y)/sqrt(2*pi*y) in PGFplots.

As a first step I plotted this as a contourplot directly from the function (see code below). The problem however is that the plot is very coarse. The next step was to increase the number of samples up to 85 (maximum before LaTeX has a memory overflow). This however was still to coarse for my taste.

Currently I'm trying to make the contourplot smoother by making a table with another program (Mathematica), that I'm trying to input as a plotlist. The problem here however is that PGFplots doesn't accept my table, resulting in no plot at all. The .dat file I'm trying is of the form

x y z
0 0 f(0,0)
0 1 f(0,1)
0 2 f(0,2)
...
1 0 f(1,0)
1 1 f(1,1)
...


I have no idea what I'm doing wrong in the conversion to the table and I can't seem to find anything in the manual. I'm open for fresh ideas.

Yes the supplied data is numerical, the data is well behaved (no extreme large or small values), I have purely numerical data and I tried both the format with and without the header. The data was included for the plot using the typical

table {table.dat};


The code for my origional plot (which does work)

\documentclass[tikz]{standalone}
\usepackage{pgfplots}
\begin{document}
\begin{tikzpicture}
\begin{axis}
[
colorbar,
colormap/hot2,
view = {0}{90},
]
contour filled={number = 10,labels={false}},
samples=31,

• samples=21,samples y=21, looks OK to me. you can change the domain too. The table needs numbers then you can use table \mytable – percusse Jul 24 '17 at 14:44