How to prevent overlapping of graph lines?

Question

Noi Sekuri 2020-7-14

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链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/565040-how-to-prevent-overlapping-of-graph-lines

评论： Star Strider 2020-7-15

Hi,

I want to plot (x,y1), (x,y2) and (x,y3) on the same graph where

x = [20000, 40000, 60000, 80000, 100000]

y1 = [100232986, 397895944, 900510601, 1597421811, 2494526740]

y2 = [260952, 561980, 877225, 1203434, 1536068]

y3 = [359227, 716397, 1088346, 1580845, 1997379]

However, when I plot these on the same graph its very difficult to distinguish between (x,y2) and (x,y3). They look as if they overlap. How can I make all of them visible (no overlapping)? They have to be on the same graph and I dont want to use semilogy. I want all of them to look like increasing functions as they are.

The code I used:

x = [20000, 40000, 60000, 80000, 100000]

y1 = [100232986, 397895944, 900510601, 1597421811, 2494526740]

y2 = [260952, 561980, 877225, 1203434, 1536068]

y3 = [359227, 716397, 1088346, 1580845, 1997379]

plot(x,y1)

hold on

plot(x,y2)

hold on

plot(x,y3)

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Answer 1

Star Strider 2020-7-14

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/565040-how-to-prevent-overlapping-of-graph-lines#answer_465791

编辑：Star Strider 2020-7-14

在 MATLAB Online 中打开

Use a logarithmic y-axis:

x = [20000, 40000, 60000, 80000, 100000];
y1 = [100232986, 397895944, 900510601, 1597421811, 2494526740];
y2 = [260952, 561980, 877225, 1203434, 1536068];
y3 = [359227, 716397, 1088346, 1580845, 1997379];
figure
semilogy(x,y1)
hold on
plot(x,y2)
plot(x,y3)
hold off
grid
legend('y_1', 'y_2', 'y_3',  'Location','E')

producing:

EDIT — (14 Jul 2020 at 20:36)

Added plot image.

.

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Noi Sekuri 2020-7-15

Thank you very much but I am looking for a way to plot them without using semilogy.

Star Strider 2020-7-15

在 MATLAB Online 中打开

My pleasure.

Note that they do not ‘overlap’. They have such significantly different amplitudes (on the order of

) that the ordinary linear scaling prevents ‘y2’ and ‘y3’ from being distinguished from 0.

The only other option I can offer is:

figure
yyaxis left
plot(x,y1)
yyaxis right
plot(x,y2)
hold on
plot(x,y3)
hold off
grid
legend('y_1', 'y_2', 'y_3',  'Location','E')

producing:

The yyaxis function was introduced in R2016a. If you have an earlier release, use plotyy instead (with different code).

Another option is to plot each one in a subplot or stackedplot (R2018b and later), however I got the impression that you wanted them plotted on the same axes.

.

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