Surface plot dimension errors

I'm having trouble plotting surfaces that are not perfect squares. I have an 8000x1 array that I need to plot. I keep getting the error "data dimensions must agree", but I'm not sure what I need to do to fix that. If you have any insight, please let me know. Below are two codes; the first code runs correctly and the second code does not. The first array could be shortened to have square dimension (20x20) without losing any data, but the second array cannot. The second code is the one I keep getting an error on.

Thanks

First Code

load ('SimulationSummary20120111_k12_catGR_kcatGPX_1_28_12.mat')

load ('table_GR_GPX_vGRss_3_14_12');

figure (1) surf(linspace(1,600,20),linspace(1,300,20),reshape(table_GR_GPX_vGRss(:,3),20,20));

saveas(figure (1),'kcatGR and kcatGPX varying vGRss','fig'); saveas(figure (1),'kcatGR and kcatGPX varying vGRss','jpeg');

Second Code

load ('SimulationSummary20120111_k12_catGR_kcatGPX_1_28_12.mat')

load ('table_12_GR_ratio_3_14_12');

figure (1) surf(linspace(.1,1,100),linspace(1,600,80),reshape(table_12_GR_ratio(:,3),100,80));

saveas(figure (1),'k12 and kcatGR varying ratio','fig'); saveas(figure (1),'k12 and kcatGR varying ratio','jpeg');