interpolating an axis to get equidistant bins

I want to plot a matrix using pcolor. My code looks like this fh = load('horizontal_scan_energy.dat');

y = fh(:,1);

x = (-1.5:0.15:+1.5); %imagesc(x,y1,fh) mycolors = [1 0 0; 1 1 0; 0 0 1]; colormap(cool(10));

%colorbar(); colormap jet; pcolor(x,y,fh); set(gca,'fontsize',20) caxis([min(min(abs(fh)))*0.01,max(max(fh))/1]) shading flat title('Delay scan','FontWeight','bold','FontSize',20); xlabel('Time(ps)'); ylabel('Kinetic Energy(eV)');

however the y axis does not has equidistant bins. I want to interpolate the axis to get equidistant bins but I do not know how. Any help is very appreciated.