Plotting multidimensional discrete Data

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Johannes Dechow
Johannes Dechow 2020-11-9
编辑： Alan Stevens 2020-11-9
Hi everyone!
I have some problem visualizing data.
I messured engine power over rpm and torque. Knowing the power input I calculated the efficiency. Now I have 560 values in discrete steps resulting in a 40x14 matrix (basicly 40 different torque settings over 14 rpm settings) and i want to create an area diagram for the efficiency.
In other words: Every column represents one rpm setting (e.g. 250 rpm) and every line represents a torque setting (e.g. 0.1 Nm)
Does anyone have an idea on how to visualize the data? I would like it to look like picture below.
My idea was to use the contour function, but to my understanding it does not work for a 40x14 matrix.
Help is appreciated! Thanks in advance,
Hannes

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回答（1 个）

Alan Stevens
Alan Stevens 2020-11-9
编辑：Alan Stevens 2020-11-9
Presumably, for every combination of rpm and torque you are able to calculate an efficiency, so you should be able to use contour
contour(x,y,z)
say, where x and y represent rpm and torque and z represents efficiency. Try doc contour for details.

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