如何在Matlab中绘制对数图 [英] How to make a log plot in matlab

问题描述

是否可以在matlab中绘制实际上不记录值对数的图?我正在绘制各种各样的值，当我尝试对它们进行对数绘制时，低于1的值将变为负数.我只想在不取其日志的情况下以对数刻度绘制值.

Is it possible to make a plot in matlab that does not actually take the logs of the values? I'm plotting wide ranges of values and when I try to make a log plot of them, those below 1 become negative. I would just like it to plot the values on a log scale without taking their logs.

推荐答案

是的，有可能.使用 loglog命令.

Yes, it is possible. Use the loglog command.

Mathworks网站上的示例:

The example from the Mathworks website:

x = logspace(-1,2);   % generate a sequence of points equally spaced logarithmically
loglog(x,exp(x),'-s')
grid on

如果您不希望两个轴都是对数刻度，请使用

If you do not want both axes to be log scale, use semilogx or semilogy.

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