how to get the values from netcdf to ascii format through matlab?

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Gargi 2014-8-13

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评论： Gargi 2014-8-15

The data is in .nc form (e.g data.nc). 1) How to extract a grid from this file format? 2) How to find the values of the extracted grid in ascii form?

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Ashish Uthama 2014-8-13

Girija, please say more. Its hard to give a helpful answer since your question does not have enough information. For example - how is the data in the netcdf file structured? Do you have lat /lon and data. Are they 1D 2D or nD? What do you mean by ASCII form? As a variable as a CSV file a text file?

To get started, please have a look at the ncread function.

Gargi 2014-8-14

Sir, data is in .nc format (data.nc) (temperature data of two years 1948-1949). Its a global data, ve to extract a grid from that data, and the value should be in ascii (csv ) form. I have to read this data and make a average of January month, February month and so on...of two years.

Sir, this data have longitude, latitude, time, and temperature of one pressure level i.e 1000.

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Answer 1

Chad Greene 2014-8-13

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Check out the names of the variables with ncdisp('data.nc') and if one of the variables is lat, you can load it with

lat = ncread('data.nc','lat');

Then you can write variables to ascii with dlmwrite.

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Chad Greene 2014-8-13

It is difficult to understand your question. Try to ask a specific question about a specific step that you're having trouble with.

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Answer 2

Supreeth Subbaraya 2014-8-14

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Take a look at the function ncread. Here you can specify the indices of the starting location of a variable and the number of elements to be read. If a variavle "var" is a two dimensional variable, then you can use the following line of code:

ncread('data.nc','var',[1, 1], [1,1])