# listcontourplot on a sector of a circle [duplicate]

s = Import["Desktop/tension.xlsx"];
ListContourPlot[s, Contours -> 10, PlotLegends -> Automatic]


In fact, it is a contour of a circular part from (2,0) (4,0) to (0,4) (0,2). However, I cannot get a contour on a sector of a circle. It has unnecessary part. How can I delete that red part to make it like the other plot from matlab?

Thanks a lot!!!:)

## marked as duplicate by Jens, ciao, m_goldberg, bbgodfrey, Karsten 7.Apr 13 '15 at 9:08

Use the option RegionFunction:
ss = Table[Sin[i + j^2] + RandomReal[], {i, 0, 3, 0.1}, {j, 0, 3, 0.1}];