[Gnuplot-info] Plotting a 2D matrix file

[Hamed A. <s.h...@ya...>]

I have a data file produced by the C programming language as:

 x      .1     .3     .4    .56
.1     .2     .1     .3    .76
.3     .4     .2     .2    .43
.6     .7     .4     .3    .67

in which the first row (.1     .3     .4    .56) corresponds to the values of x-axis, first column is related to the y-axis (.1   .3  .5) and other values correspond to the z-axis for each x and y values. For example, the .76 is the weight of point (.56 , .1). I want to plot this 2D matrix file as a 2d picture. I tried this command 

plot "file" matrix using 1:2:3 every :::1::1 w image
and plotted it.
My problem is that  Gnuplot use row and column numbers for x- and y-axis values not values on first row and column. 

When i use command

plot "file" binary matrix  w image
gives the error "Read grid of zero width".

Any help will be highly appreciated.

Hamed Ahmadi