将变量从Netcdf导入Python [英] Importing variables from Netcdf into Python

问题描述

我对Python还是很陌生，我设法将一些变量从NetCDF读入Python并绘制它们，但是变量的大小不正确.

I am very new to Python, and I have managed to read in some variables from NetCDF in to Python and plot them, but the size of the variables isn't correct.

我的数据集是144 x 90(lon x lat)，但是当我调用变量时，它似乎错过了很大一部分数据.

My dataset is 144 x 90 (lon x lat) but when I call in the variables, it seems to miss a large section of data.

我是否需要指定正在读取的数据集的大小?那是我在这里做错了吗?

Do I need to specify the size of the dataset I'm reading in? Is that what I'm doing wrong here?

这是我正在使用的代码:

Here is the code I am using:

    import netCDF4
    from netCDF4 import Dataset
    from pylab import *

    ncfile = Dataset('DEC3499.aijE03Ccek11p5A.nc','r')

    temp = ncfile.variables['tsurf']
    prec = ncfile.variables['prec']

    subplot(2,1,1)
    pcolor(temp)

    subplot(2,1,2)
    pcolor(prec)

    savefig('DEC3499.png',optimize=True,quality=85)

    quit()

请澄清一下，这是显示输出的图像.框的最右边应该有数据.

Just to clarify, here is an image showing the output. There should be data right to the far right hand side of the box.

( http://img163.imageshack.us/img163/6900/screenshot20130520at112.png )

推荐答案

我知道了.

对于那些感兴趣的人，我只需要修改以下几行即可正确提取变量:

For those interested, I just needed to amend the following lines to pull in the variables properly:

temp = ncfile.variables['tsurf'][:,:]
prec = ncfile.variables['prec'][:,:]

谢谢！

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