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plotcorrmat2.m
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plotcorrmat2.m
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% plot scatter plot matrix
function plotcorrmat2(tb2plot1, tb2plot2)
screensize = get( groot, 'Screensize' );
figure('Position', [0.35*(screensize(3)-0.85*screensize(4)) 0.07*screensize(4) 0.85*screensize(4) 0.85*screensize(4)])
[S,AX,BigAx,H,HAx] = plotmatrix(table2array(tb2plot1), table2array(tb2plot2),'.k');
% [S,AX,BigAx,H,HAx] = plotmatrix(table2array(tb2plot));
BigAx.Visible = 'on';
BigAx.XAxisLocation = 'top';
BigAx.XLim = [0 1];
BigAx.XTick = [0.5/size(table2array(tb2plot1),2):1/size(table2array(tb2plot1),2):1-0.5/size(table2array(tb2plot1),2)];
BigAx.XTickLabel = tb2plot1.Properties.VariableNames;
BigAx.YAxisLocation = 'right';
BigAx.YTickLabelRotation = -90;
BigAx.YLim = [0 1];
BigAx.YTick = [0.5/size(table2array(tb2plot2),2):1/size(table2array(tb2plot2),2):1-0.5/size(table2array(tb2plot2),2)];
BigAx.YTickLabel = fliplr(tb2plot2.Properties.VariableNames);
% correlation coefficient and p value
% the matlab corrcoef function cannot deal with NaN values well
%[corrmat, pmat] = corrcoef([table2array(tb2plot1),table2array(tb2plot2)],'rows','complete');
% corrmat
array2corr = [table2array(tb2plot1),table2array(tb2plot2)];
corrmat = zeros(size(array2corr,2));
pmat = zeros(size(array2corr,2));
for i = 1:size(array2corr,2)
for j = 1:size(array2corr,2)
[r,p] = corrcoef(array2corr(:,i),array2corr(:,j),'rows','complete');
corrmat(i,j) = r(1,2);
pmat(i,j) = p(1,2);
end
end
cmap = colormap(parula);
cmap = cmap(length(cmap)/2+1:length(cmap),:);
% cmap = colormap(summer);
% set background color depending on correlation coefficient
for i = 1:size(tb2plot2,2)
for j = 1:size(tb2plot1,2)
set(AX(i,j), 'color', cmap(ceil(abs(corrmat(j,size(tb2plot1,2)+i))*length(cmap)),:));
txt1 = ['r= ', num2str(round(corrmat(j,size(tb2plot1,2)+i),2))];
txt2 = ['p=', num2str(round(pmat(j,size(tb2plot1,2)+i),2,'significant'))];
txt3 = ['n=', num2str(sum( ~isnan(table2array(tb2plot2(:,i))) & ~isnan(table2array(tb2plot1(:,j))) ))];
txt = {txt1;txt2;txt3};
xlab = AX(i,j).XLim;
ylab = AX(i,j).YLim;
text(AX(i,j), xlab(2)-(xlab(2)-xlab(1))/3, ylab(2)-(ylab(2)-ylab(1))/10, txt, 'FontSize',8)
end
end