[Gnuplot-info] Avoiding Squarish Blocky Look in False Color Charts and/or Contour Maps?

[Vik R. <vi...@mi...>]

When I run a sample contour chart in Excel and in DeltaGraph, I get a different look than I do with the false color map in gnuplot. The Excel and DeltaGraph charts have very straight, angled edges, which my client prefers. The gnuplot chart is in squarish blocks. Is it possible to avoid this squarish blocky look, and to get this look that we find in Excel and Deltagraph charts, with a gnuplot false color or contour chart? 

Link to Excel sample chart:
http://www.market-research-services.com/Temporary/Excel-sample.jpg

Link to DeltaGraph sample chart:
http://www.market-research-services.com/Temporary/DeltaGraph-sample.jpg

Link to Gnuplot sample chart:
http://www.market-research-services.com/Temporary/gnuplot-sample.jpg

Link to datafile:
http://www.market-research-services.com/Temporary/dataFileKey_30

Thanks very much in advance for any info.

Best,


-Vik




gnuplot commands:
unset surface
unset key
set view map
set pm3d
set palette defined (0 'black', 2 'gray50', 3 'dark-blue', 8.43243243243 'dark-green', 18.972972973 'light-green', 20.5263157895 '#dac000', 30.7894736842 '#fee000', 32.8421052632 '#ff8000', 55.4210526316 '#ff5a00', 66.7105263158 'orange-red', 78 'dark-red')
set output '/Applications/Heatmaps/htdocs/ftp/Heatmaps/heatMap_key30.jpg'

set term jpeg size 600, 600 enhanced font '/Library/Fonts/arial.ttf' 8
set dgrid3d 400,400 gauss 0.35,0.35
set size square
set xtics("" 1, "Day 0" 2, "2-7\ndays" 3, "2\nWeeks" 4, "3\nWeeks" 5, "1\nMonth" 6, "2-3\nMonths" 7, "4-6\nMonths" 8, "7-12\nMonths" 9, "1 Year+" 10 )
set title '{/=18 Chart Title}' offset 0, .5
set ylabel '{/=16 Degree of Influence}' offset -1.6, 0
set xlabel '{/=16 Days from Purchase}' offset 0,-1.6
set xtics out nomirror
set ytics out nomirror
set ytics("" 0, "1" 1, "2" 2, "3" 3, "4" 4, "5" 5, "6" 6, "7" 7, "8" 8, "9" 9, "10" 10, "" 11)
set y2tics("" 0, "1" 1, "2" 2, "3" 3, "4" 4, "5" 5, "6" 6, "7" 7, "8" 8, "9" 9, "10" 10, "" 11)
set xrange [0:11] reverse
set yrange [0:11]
splot [1:] '/Applications/Heatmaps/htdocs/ftp/Heatmaps/dataFileKey_30' matrix

replot