As soon as I get to set(gca) the plot disappears. If I continue I get the date formatted tick labels but I don't show any plot. Thanks
plot(matrix(:,1),matrix(:,7));axis tightxlabel('Date');ylabel('PnL');set(gca,'xtick',linspace(733645,736117,50)); % label 10 ticks using start/end
datetick('x',2,'keepticks'); %convert serial number to date
ax=gca; % get current axis
ax.XTickLabelRotation=45; % rotate ticks 45 degrees
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