Opened 6 years ago

## #20900 new defect

# Plot fails for solution of ordinary diff equation

Reported by: | fccoelho | Owned by: | |
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Priority: | major | Milestone: | sage-7.3 |

Component: | PLEASE CHANGE | Keywords: | |

Cc: | Merged in: | ||

Authors: | Reviewers: | ||

Report Upstream: | N/A | Work issues: | |

Branch: | Commit: | ||

Dependencies: | Stopgaps: |

### Description

On sage 7.1 plot is failing for this simple function:

var('t r K') N = function('N')(t) diffeq2 = diff(N, t) == r*N*(1-N/K) sol = desolve(diffeq2,dvar=N, ivar=t)#, ics=(0,10)) plot(sol(r=0.3,K=60, _C=10),(t,0,40))

The error message is this:

verbose 0 (3517: plot.py, generate_plot_points) WARNING: When plotting, failed to evaluate function at 200 points. verbose 0 (3517: plot.py, generate_plot_points) Last error message: 'unable to simplify to float approximation'

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