QCustom plot is extremely impressive. Recently I faced a problem with logarithmic scale. When I set the scale to logarithmic and plot data points, the spacing of major grid lines at 10,100,1000... are correct, but the spacing of minor grid lines are not correct. However the datapoints are marked in correct locations. Minor axis grid does not coincide with the data value. Let's say, if I plot (20,4), it shows the point at (20,4), but it does not fall on the the minor axis grid 20. I confirmed the location of point as correct by comparing the plot with MATLAB. So problem lies in the plotting of the minor axis grid lines. Please resolve it.