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ArrayPlot with inverted ColorFunction depending on MaxPlotPoints

• To: mathgroup at smc.vnet.net
• Subject: [mg109057] ArrayPlot with inverted ColorFunction depending on MaxPlotPoints
• From: Rui <rui.rojo at gmail.com>
• Date: Mon, 12 Apr 2010 06:52:32 -0400 (EDT)

Why does this work this way?
lolo = - Table[i j, {i, 1, 7}, {j, 1, 128}]  (* is negative *)
ArrayPlot[lolo, ColorFunction -> "TemperatureMap", AspectRatio -> 1/
GoldenRatio, MaxPlotPoints -> 128]
shows with the colors right (and higher MaxPlotPoints too), but

ArrayPlot[lolo, ColorFunction -> "TemperatureMap", AspectRatio -> 1/
GoldenRatio, MaxPlotPoints -> 127] shows them with the ColorFunction
inverted

Thankx