# Revision history [back]

No elaborate solution (some knowledge of f and g would come handy). A couple of hints :

• The syntax of a conditional expression in Sage is : result-if true if condition else result-if-false. No comma involved.

• implicit_plot3d? might make your day (see the region argument)... but is damn heavy !

• In the current implementations of plot3d, friends and cousins, points having value float(nan) do not plot. This might come handy but is not documented and might go without warning at the next revision of those functions.

No elaborate solution (some knowledge of f and g would come handy). A couple of hints :

• The syntax of a conditional expression in Sage is : result-if true if condition else result-if-false. No comma involved.

• implicit_plot3d? might make your day (see the region argument)... but is damn heavy !

• In the current implementations of plot3d, friends and cousins, points having value float(nan)float("nan") do not plot. This might come handy but is not documented and might go without warning at the next revision of those functions.

No elaborate solution (some knowledge of f and g would come handy). A couple of hints :

• The syntax of a conditional expression in Sage is : result-if true if condition else result-if-false. No comma involved.

• implicit_plot3d? might make your day (see the region argument)... but is damn heavy !

• In the current implementations of plot3d, friends and cousins, points having value float("nan") do not plot. This might come handy but is not documented and might go without warning at the next revision of those functions.

No elaborate solution (some knowledge of f and g would come handy). A couple of hints :

• The syntax of a conditional expression in Sage is : result-if true if condition else result-if-false. No comma involved.

• implicit_plot3d? might make your day (see the region argument)... but is damn heavy !

• In the current implementations of plot3d, friends and cousins, points having value float("nan")float('nan') do not plot. This might come handy but is not documented and might go without warning at the next revision of those functions.