How can I calculate Equitable threat score and frequency bias in matlab?

I am new to matlab. I am having two .ctl files of different resolution. First of all, I need to interpolate one file on another and after that, I need to calculate ETS and bias.

Please help me to do this.

[Athul C P]

Upto this I have done. Please help me.

read_grads('2016081600-rainfall-3da.ctl','rain');

read_grads('imdmsg1.ctl','rf');

%% Box to read%% Latitude1=5;Latitude2=38; Longitude1=65;Longitude2=100;

Bx(1)=Latitude2; Bx(2)=Longitude1; Bx(3)=Latitude1; Bx(4)=Longitude2; % Box for Interpolation

stx=65;stpx=.036;nx=1001-1; %%% Longitude from CTL file sty=5;stpy=.036;ny=1001-1; %%% Latitude from CTL file

[myX myY]=meshgrid(stx:stpx:stx+nx*stpx,sty:stpy:sty+ny*stpy);