{VERSION 3 0 "IBM INTEL NT" "3.0" } {USTYLETAB {CSTYLE "Maple Input" -1 0 "Courier" 0 1 255 0 0 1 0 1 0 0 1 0 0 0 0 }{CSTYLE "2D Math" -1 2 "Times" 0 1 0 0 0 0 0 0 2 0 0 0 0 0 0 }{CSTYLE "Hyperlink" -1 17 "" 0 1 0 128 128 1 0 0 1 0 0 0 0 0 0 } {CSTYLE "2D Comment" 2 18 "" 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 }{CSTYLE " " 0 21 "" 0 1 0 0 0 1 0 0 0 0 2 0 0 0 0 }{CSTYLE "Help Heading" -1 26 "" 1 14 0 0 0 0 0 1 0 0 0 0 0 0 0 }{PSTYLE "Normal" -1 0 1 {CSTYLE "" -1 -1 "" 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 }0 0 0 -1 -1 -1 0 0 0 0 0 0 -1 0 }{PSTYLE "Heading 1" 0 3 1 {CSTYLE "" -1 -1 "" 1 18 0 0 0 0 0 1 0 0 0 0 0 0 0 }1 0 0 0 6 6 0 0 0 0 0 0 -1 0 }} {SECT 0 {SECT 0 {PARA 0 "" 0 "" {TEXT 26 7 "Advice:" }{TEXT -1 19 " Ho w many contours?" }}{PARA 0 "" 0 "" {TEXT -1 0 "" }}{PARA 0 "" 0 "" {TEXT -1 3 "In " }{MPLTEXT 0 21 11 "contourplot" }{TEXT -1 13 ", the o ption " }{MPLTEXT 0 21 10 "contours=n" }{TEXT -1 15 " means that if " }{XPPEDIT 18 0 "U" "6#%\"UG" }{TEXT -1 5 " and " }{XPPEDIT 18 0 "L" "6 #%\"LG" }{TEXT -1 143 " are the maximum and minimum function values on the grid of points that Maple uses for the plot, the contour values a re at intervals of length " }{XPPEDIT 18 0 "(U-L)/n" "6#*&,&%\"UG\"\" \"%\"LG!\"\"F&%\"nGF(" }{TEXT -1 9 ". Since " }{XPPEDIT 18 0 "U" "6#% \"UG" }{TEXT -1 5 " and " }{XPPEDIT 18 0 "L" "6#%\"LG" }{TEXT -1 88 " \+ themselves will generally not correspond to curves on the plot, there \+ will actually be " }{XPPEDIT 18 0 "n-1" "6#,&%\"nG\"\"\"\"\"\"!\"\"" } {TEXT -1 15 " contours. In " }{MPLTEXT 0 21 13 "contourplot3d" } {TEXT -1 4 " or " }{MPLTEXT 0 21 26 "plot3d(..., style=contour)" } {TEXT -1 193 ", on the other hand, Maple takes the contour values to b e integer multiples of a number that is 1, 2 or 5 times a power of 10, using the smallest number of this form that will produce at least " } {XPPEDIT 18 0 "n" "6#%\"nG" }{TEXT -1 49 " contour values. This was a lso the behaviour of " }{MPLTEXT 0 21 11 "contourplot" }{TEXT -1 20 " \+ prior to Release 4." }}{PARA 0 "" 0 "" {TEXT -1 31 "On the other hand, you can use " }{MPLTEXT 0 21 11 "contours= [" }{TEXT -1 17 "a list of values " }{MPLTEXT 0 21 1 "]" }{TEXT -1 62 ", which gives you full co ntrol of the values that are plotted." }}}{SECT 0 {PARA 3 "" 0 "" {TEXT 26 9 "Examples:" }}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 39 "wit h(plots,contourplot3d, contourplot):" }}}{PARA 0 "" 0 "" {TEXT -1 8 "H ere in " }{MPLTEXT 0 21 13 "contourplot3d" }{TEXT -1 67 " the contour \+ values are multiples of .2, producing 5 contours. In " }{MPLTEXT 0 21 11 "contourplot" }{TEXT -1 101 ", on the other hand, the range 0 to 1 is divided into intervals of length 1/4, and we see 3 contours." }} {EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 74 "contourplot3d(x,x=0..1,y=0.. 1,contours=4,orientation=[100,90],axes=FRAME);" }}}{EXCHG {PARA 0 "> \+ " 0 "" {MPLTEXT 1 0 40 "contourplot(x,x=0..1,y=0..1,contours=4);" }}} {EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 55 "contourplot(x,x=0..1,y=0..1, contours=[.2, .4, .6, .8]);" }}}}{SECT 0 {PARA 0 "" 0 "" {TEXT 26 9 "S ee also:" }{TEXT -1 1 " " }{HYPERLNK 17 "contourplot, contourplot3d" 2 "plots,contourplot" "" }{TEXT -1 2 ", " }{HYPERLNK 17 "plot3d[option s]" 2 "plot3d[options]" "" }}}{SECT 0 {PARA 0 "" 0 "" {TEXT 26 22 "Map le Advisor Database" }{TEXT -1 18 " R. Israel, 1997" }}}}{MARK "1 4 \+ 0 0" 27 }{VIEWOPTS 1 1 0 1 1 1803 }