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

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);

[Srivardhan Gadila]

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]

You have not attched the said file.

[SKP]

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]

I am having the same problem, can anyone help?

Answer 1

[SKP]

'fopen' worked for me. Sample code is appended below

filename=['XYZ.grd'];
fileID = fopen(filename);
output = fread(fileID,'float');

[Aarti Soni]

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]

Please use 'reshape' function to change a vector into a matrix

[Aarti Soni]

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.