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{SECT 0 {SECT 0 {PARA 0 "" 0 "" {TEXT 26 7 "Bug fix" }{TEXT -1 33 ": D
Eplot and DEplot3d with coords" }}{PARA 0 "" 0 "" {TEXT -1 0 "" }}
{PARA 0 "" 0 "" {TEXT -1 4 "The " }{MPLTEXT 0 21 6 "coords" }{TEXT -1 
118 " option, which allows the use of non-Cartesian coordinate systems
 in many other plotting commands, does not work with " }{MPLTEXT 0 21 
6 "DEplot" }{TEXT -1 4 " or " }{MPLTEXT 0 21 8 "DEplot3d" }{TEXT -1 6 
".  In " }{MPLTEXT 0 21 6 "DEplot" }{TEXT -1 33 " it causes an error m
essage.  In " }{MPLTEXT 0 21 8 "DEplot3d" }{TEXT -1 74 " there is no e
rror message, but the plot is done in Cartesian coordinates." }}
{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 127 "DEplot(\{diff(r(t),t)=-sin(
theta(t))/2, diff(theta(t),t)=1/2\}, \n[r(t),theta(t)], t=0..Pi, \n[[r
(0)=1,theta(0)=0]], coords=polar);" }}{PARA 8 "" 1 "" {TEXT -1 67 "Err
or, (in plot/options2d) unknown or bad argument, coords = polar\n" }}}
{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 156 "DEplot3d(\{diff(r(t),t)=-si
n(theta(t))/2, diff(theta(t),t)=1/2\}, \n[r(t),theta(t)], t=0..2*Pi, \+
\n[[r(0)=1,theta(0)=0]], scene=[r,theta,t],\ncoords=cylindrical);" }
{TEXT -1 0 "" }}}{EXCHG {PARA 0 "" 0 "" {TEXT -1 111 "A work-around  i
s to produce the plot using rectangular coordinates, and change to pol
ar coordinates using the " }{MPLTEXT 0 21 12 "changecoords" }{TEXT -1 
18 " command from the " }{MPLTEXT 0 21 5 "plots" }{TEXT -1 10 " packag
e. " }}}{EXCHG {PARA 0 "> " 0 "" {MPLTEXT 1 0 161 "plots[changecoords]
(\nDEplot(\{diff(r(t),t)=-sin(theta(t))/2, diff(theta(t),t)=1/2\}, [r(
t),theta(t)], t=0..Pi, [[r(0)=1,theta(0)=0]], scaling=constrained), po
lar);" }{TEXT -1 0 "" }}}{EXCHG {PARA 0 "" 0 "" {TEXT -1 114 "In the t
hree-dimensional case, because of another bug, you must substitute CUR
VES for CURVELIST before doing this." }}}{EXCHG {PARA 0 "> " 0 "" 
{MPLTEXT 1 0 194 "plots[changecoords](subs(CURVELIST=CURVES,\nDEplot3d
(\{diff(r(t),t)=-sin(theta(t))/2, diff(theta(t),t)=1/2\}, \n[r(t),thet
a(t)], t=0..2*Pi, \n[[r(0)=1,theta(0)=0]], scene=[r,theta,t])),\ncylin
drical);" }{TEXT -1 0 "" }}}}{SECT 0 {PARA 3 "" 0 "" {TEXT 26 9 "See a
lso:" }}{PARA 0 "" 0 "" {HYPERLNK 17 "DEplot" 2 "DEplot" "" }{TEXT -1 
2 ", " }{HYPERLNK 17 "DEplot3d" 2 "DEplot3d" "" }{TEXT -1 2 ", " }
{HYPERLNK 17 "DEtools" 2 "DEtools" "" }{TEXT -1 2 ", " }{HYPERLNK 17 "
dfieldplot" 2 "dfieldplot" "" }{TEXT -1 2 ", " }{HYPERLNK 17 "display
" 2 "display" "" }{TEXT -1 2 ", " }{HYPERLNK 17 "dsolve(numeric)" 2 "d
solve,numeric" "" }{TEXT -1 2 ", " }{HYPERLNK 17 "fieldplot" 2 "fieldp
lot" "" }{TEXT -1 2 ", " }{HYPERLNK 17 "odeplot" 2 "odeplot" "" }
{TEXT -1 2 ", " }{HYPERLNK 17 "phaseportrait" 2 "phaseportrait" "" }
{TEXT -1 2 ", " }{HYPERLNK 17 "plot" 2 "plot" "" }{TEXT -1 2 ", " }
{HYPERLNK 17 "spacecurve" 2 "spacecurve" "" }{TEXT -1 1 " " }}}{SECT 
0 {PARA 0 "" 0 "" {TEXT 26 23 "Maple Advisor Database " }{TEXT -1 14 "
R. Israel 1998" }}}}{MARK "0 2 0" 0 }{VIEWOPTS 1 1 0 1 1 1803 1 1 1 1 
}{PAGENUMBERS 0 1 2 33 1 1 }