忽略y = 0的点 [英] Ignore points with y=0

问题描述

我正在绘制一个图，我想省略所有y = 0的点.我不知道这些结果出现在哪行的先验知识，所以我不能告诉gnuplot仅使用某些行.

I am plotting a graph and I would like to omit all points that have y=0. I don't know a priori at which lines these results appear, so I can't tell gnuplot to use just some lines.

有可能还是必须编辑我的数据集(并将y = 0替换为超出范围的某处)?

Is that possible or do I have to edit my data set (and replace y=0 for somewhere outside my range)?

推荐答案

您可以很容易地做到这一点:

You can do this pretty easily:

plot "mydataset.dat" u 1:($2 == 0 ? NaN : $2)

在这里，我们使用gnuplot三元运算符将0的值替换为NaN. Gnuplot默默地忽略了NaN，因此应该可以正常工作.

Here we use the gnuplot ternary operator to replace values of 0 with NaN. Gnuplot silently ignores NaN, so that should work just fine.

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