How to add custom scale to SPI/SPEI computation for NetCDF data?

[devisdevis]

Hello,

Please I would like to compute custom scale SPI/SPEI indices for NetCDF data in ClimPact2?
Is there any detail in the documentation about the use of user-defined values for NetCDF data?

Thanks

[heroldn]

This isn't supported for netcdf, but the code change should be trivial. You could try changing both instances of "scale <- c(3,6,12)" in climpact.etsci-functions.r. This hasn't been tested but give it a go.

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[devisdevis]

Thanks, it works but the attribute (names) remain identical, which is confusing. What file could be tweaked to get the attributes right?
Also, when I try to increase the number of SPI/SPEI scales (more than 3 scale levels like c(3,6,9,12,24)) and modify the ncdf.R in 'climdex.pcic.ncdf', it doesn't work.
Any clue to solve that please?

[ADATHIAN513]

I need help calculating SPEI/SPI. When I use the Climpact function to add 1-month and 24-month scales, it doesn't work as expected. Has anyone encountered this problem before, or would you have a solution for integrating these scales into the index calculation?
Thanks in advance for your help!