How can i extrat some value by a plot?

Question

Pietro Fiondella 2022-7-15

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1761245-how-can-i-extrat-some-value-by-a-plot

编辑： Voss 2022-7-15

采纳的回答： Voss

在 MATLAB Online 中打开

I have 2 vectors forming a plot

MA=[0.763 0.724 0.822 0.839 0.957 1.000 0.963 0.911 0.583 0.480 0.424 0.490];

Month=[1 2 3 4 5 6 7 8 9 10 11 12];

plot(Month,MonthC_A)

The plot is made be a continuos line that connect 2 succesive value of MA divided of a space 1 (space between of Month elements).

I would like to get a vetor X=[1x48] wich has as elemts, 4 values between each interval of space 1.

For example the first 2 elements of MA are 0.763 and 0.724 and and in the plot are the matching value of 1 and 2 on the x axis, i would like to obtain the value of 1, 1.25, 1.5, 1.75, 2

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Voss 2022-7-15

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1761245-how-can-i-extrat-some-value-by-a-plot#answer_1008520

编辑：Voss 2022-7-15

在 MATLAB Online 中打开

MonthC_A=[0.763 0.724 0.822 0.839 0.957 1.000 0.963 0.911 0.583 0.480 0.424 0.490];

Month=[1 2 3 4 5 6 7 8 9 10 11 12];

plot(Month,MonthC_A)

Month_interp = linspace(Month(1),Month(end),4*(numel(Month)-1)+1)

Month_interp = 1×45

1.0000 1.2500 1.5000 1.7500 2.0000 2.2500 2.5000 2.7500 3.0000 3.2500 3.5000 3.7500 4.0000 4.2500 4.5000 4.7500 5.0000 5.2500 5.5000 5.7500 6.0000 6.2500 6.5000 6.7500 7.0000 7.2500 7.5000 7.7500 8.0000 8.2500

MonthC_A_interp = interp1(Month,MonthC_A,Month_interp)

MonthC_A_interp = 1×45

0.7630 0.7532 0.7435 0.7337 0.7240 0.7485 0.7730 0.7975 0.8220 0.8262 0.8305 0.8347 0.8390 0.8685 0.8980 0.9275 0.9570 0.9677 0.9785 0.9892 1.0000 0.9908 0.9815 0.9722 0.9630 0.9500 0.9370 0.9240 0.9110 0.8290

hold on

plot(Month_interp,MonthC_A_interp,'r.')