Partial derivative function definitions
- To: mathgroup at smc.vnet.net
- Subject: [mg127531] Partial derivative function definitions
- From: "Mat' G\." <ellocomateo at free.fr>
- Date: Thu, 2 Aug 2012 04:50:42 -0400 (EDT)
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- Delivered-to: l-mathgroup@wolfram.com
- Delivered-to: mathgroup-newout@smc.vnet.net
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Hello, Can someone please explain me why the following partial derivative function definitions do not work? I get errors like: General::ivar: -6.28229 is not a valid variable. >> General::ivar: -5.38469 is not a valid variable. >> General::ivar: -4.48709 is not a valid variable. >> General::stop: Further output of General::ivar will be suppressed during this calculation. >> Thanks for helping! Mat XFunction[x_, y_] := Sin[x] Sin[y]; YFunction[x_, y_] := Cos[x] Cos[y]; dXFunctiondx[x_, y_] := D[XFunction[x, y], x]; dXFunctiondy[x_, y_] := D[XFunction[x, y], y]; dYFunctiondx[x_, y_] := D[YFunction[x, y], x]; dYFunctiondy[x_, y_] := D[YFunction[x, y], y]; Grid[{ { DensityPlot[ XFunction[x, y], {x, -2 \[Pi], 2 \[Pi]}, {y, -2 \[Pi], 2 \[Pi]}] , DensityPlot[ YFunction[x, y], {x, -2 \[Pi], 2 \[Pi]}, {y, -2 \[Pi], 2 \[Pi]}] } , { DensityPlot[ dXFunctiondx[x, y], {x, -2 \[Pi], 2 \[Pi]}, {y, -2 \[Pi], 2 \[Pi]}] , DensityPlot[ dYFunctiondx[x, y], {x, -2 \[Pi], 2 \[Pi]}, {y, -2 \[Pi], 2 \[Pi]}] } , { DensityPlot[ dXFunctiondy[x, y], {x, -2 \[Pi], 2 \[Pi]}, {y, -2 \[Pi], 2 \[Pi]}] , DensityPlot[ dYFunctiondy[x, y], {x, -2 \[Pi], 2 \[Pi]}, {y, -2 \[Pi], 2 \[Pi]}] } }]
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- Re: Partial derivative function definitions
- From: Bob Hanlon <hanlonr357@gmail.com>
- Re: Partial derivative function definitions