Unable to read the .grd file using grdread2.m function

SKP
2021 10 1
1 个回答
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更新时间：2023 6 7
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1 个投票

I am trying to read the attached 'file1.GRD' file using the code below. The function 'grdread2.m' is downloaded from MATLAB file exchange, as recommended in one fo the previous posts.
filename = 'file1.GRD';
[x,y,z] = grdread2(filename);
However, it is giving me errors listed below. Could someone help me?
Error using netcdf.open (line 52)
Could not open file 'Mintemp_MinT_2019.grd'.
Error in grdread2 (line 61)
ncid = netcdf.open(file, 'NC_NOWRITE');
Error in ReadnplotGRD (line 2)
[x,y,z] = grdread2(filename);

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Srivardhan Gadila
Srivardhan Gadila 2021-10-4
The function grdread2 (https://mathworks.com/matlabcentral/fileexchange/25683-grdread2) is one of the several submissions in MATLAB File Exchange on MATLAB Central, which is a forum for our product users to interact, exchange information and knowledge, without MathWorks' involvement. Hence I would suggest to contact the author of this submission directly for any questions related to it.
KSSV
KSSV 2021-10-4
You have not attched the said file.
SKP
SKP 2021-10-4
编辑：SKP 2021-10-4
Sorry, I failed to previously see that the forum gave file format error when I tried to upload .grd file directly. I have compressed and attached the file now.
I shall also contact the original author.
Thank you for responding to this question.
Aarti Soni
Aarti Soni 2023-5-31
I am having the same problem, can anyone help?

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SKP
SKP 2023-6-1
编辑：SKP 2023-6-1

1 个投票

'fopen' worked for me. Sample code is appended below
filename=['XYZ.grd'];
fileID = fopen(filename);
output = fread(fileID,'float');

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Aarti Soni
Aarti Soni 2023-6-1
Thank @SKP for your response.
yes, the you have shared it is working. Output showing 2d vector data (350765*1) instead of matrix.
How did you open IMD data (Mintemp_MinT_2019.grd)? I am looking for the same data.
SKP
SKP 2023-6-1
Please use 'reshape' function to change a vector into a matrix
Aarti Soni
Aarti Soni 2023-6-7
hello @SKP
for 0.25 deg rainfall data i have used reshape function as
rainfall = reshape(rf, 135,129); (vector size = 17415*1)
it is working properly but for temperature data, how can I create matrix as it is showing on website that data is arranged into 31 X 31
thanks.

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