Here's a short gnuplot example that illustrates 3-d function plotting with contours and hidden line removal.

下面是一个简单的gnuplot例子，它给出了一个具有等高线和隐线消除的3 - D图形。

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For plotting, gnuplot can generate 2-d plots with the plot command and 3-d plots (as 2-d projections) with the splot command.

为了进行绘图，gnuplot可以使用plot命令生成2 - D图形，或使用splot命令生成3 - d图形(作为2 - D projection)。

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The paper presents a principle and method of automatic measuring and plotting magnetic material's magnetic hysteresis loop via computer's parallel port have the aid of A/D transition adapter.

介绍借助A/D转换板，通过微机并行口实现铁磁材料磁滞回线自动测绘的原理与方法。

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