小编use*_*910的帖子

如何在gnuplot中更改磅值,形状和颜色.

plot "./points.dat" using 1:2 title with dots

我使用上面的命令绘制图形,但它显示非常小的点.

我试着用命令

set pointsize 20

但仍然点大小相同.

我想运行一个涉及网络内容的haskell代码.

ghc firewall.hs

错误信息

firewall.hs:1:8:
    Could not find module `Network.HTTP.Enumerator'
    Use -v to see a list of the files searched for.

任何人都可以告诉我如何在haskell中安装模块,如果这个问题与此相关.

我正在尝试打印每个像素的值,但是它会给出错误p = 300.之前p = 300,所有像素都打印出来.

orignal.getHeight() = 344;和orignal.getWidth() = 300;.

BufferedImage binarized = new BufferedImage(original.getWidth(), original.getHeight(), original.getType());
int p, q;

System.out.println(original.getHeight() + "," + original.getWidth());

for(p=0;p<original.getHeight();p++)
{
    for(q = 0; q < original.getWidth(); q++)
    {
        //System.out.println("goint to get pixel"+"("+p+","+q+")");
        int Pixel = binarized.getRGB(p, q);
    }
}

错误信息:

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: Coordinate out of bounds!
    at sun.awt.image.ByteInterleavedRaster.getDataElements(ByteInterleavedRaster.java:318)
    at java.awt.image.BufferedImage.getRGB(BufferedImage.java:888)
    at Binarization.binarize(Binarization.java:137)
        at Binarization.main(Binarization.java:20)

这是某种内存分配问题吗？