render contour with custom thresholds

[TBusan]

I want to render contour with custom thresholds. like this array [0,1.507,2.273,3.428,5.169,7.794,11.75,17.72,26.73,40.3,60.77,91.64,138.2,208.4,314.2,473.8,714.5,1323.2]。 but can noly set contours.size contours.size contours.start contours.end or use ncontours。