How to plot different length vectors against each other?

Question

Keshav 2023-12-6

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2057279-how-to-plot-different-length-vectors-against-each-other

评论： Steven Lord 2023-12-6

采纳的回答： Torsten

I've used ode45 to find t against x and t against y. The plot I want to create is of x against y.

However the x vector has a length of 113 compared to 1849 for y because of the differences in timestep.

Is there a way to interpolate and plot(x,y)? Or perhaps to specify that ode45 creates more x values.

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Answer 1

Torsten 2023-12-6

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https://ww2.mathworks.cn/matlabcentral/answers/2057279-how-to-plot-different-length-vectors-against-each-other#answer_1367029

移动：Torsten 2023-12-6

However the x vector has a length of 113 compared to 1849 for y because of the differences in timestep.

Solve for x and y together in one call to ode45. Then the solutions for x and y will have the same number of elements.

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Steven Lord 2023-12-6

Or if you must solve them in separate calls to ode45, either pass the times from the first as the tspan in the second call or call them each with one output and use the deval function on that struct output to evaluate the solutions at a common list of times.

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