Define a function that behaves in the same way as mean(x) and mean(x,d) except that it ignores NaNs (unless all of the values being averaged are NaNs, in which case the result for those values should be NaN).
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Count from 0 to N^M in base N.
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256 Solvers
What is the distance from point P(x,y) to the line Ax + By + C = 0?
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179 Solvers