relocate a part of an image

Hi,

I am having a matrix of time series of temperature images (lon,lat,time). The given images/matrix (see first attachment) starts from Africa/Europe and moves on to North/South America. My other data sets starts from North/South America and moves on to Africa/Europe See (second/third attachment). For further analysis I need to have same matrix or structure. How can I change the first image so that it looks like the second one. Maybe cropping the end and setting it in the front? Unfortunately, I am not able to do it.

Any help is appreciated! Thanks

[KSSV]

Add 360 to negative lons. You will get what you want....if you are not able to..provide the data.

[Ha Sen]

lon doesn't show neg values..

Here, is a link where you can download one file, for instance, tmax.2015.nc

<ftp://ftp.cdc.noaa.gov/Datasets/cpc_global_temp/>

Thanks.

[KSSV]

I think you want to change the second image to the first image. From the nc file data I can see that, you get the second plot.

[Ha Sen]

Could you send me your plot?

[KSSV]

This the plot I got from tmax2016.nc file.

[Ha Sen]

Ok, so you can see that your image shows (from left to right) first africa than asia and lastly north/south america. I want to start it with N/S America than Africa than Asia like my last image (3rd or 4th)

Answer 1

[KSSV]

ncfile = 'C:\Users\srinivas\Downloads\tmax.2016.nc' ;
lon = ncread(ncfile,'lon') ;
lat = ncread(ncfile,'lat') ;

tmax = ncread(ncfile,'tmax') ;

lon = lon-180 ;
idx = lon>=0 ;
lon(idx) = lon(idx)-360 ;
[lon,idx] = sort(lon) ;
pcolor(lon,lat,tmax(idx,:,1)') ; shading interp ;