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| sensitivity[a_, c_] := (a/(a + c))*100 specificity[b_, d_] := (d/(b + d))*100 pPV[a_, b_] := (a/(a + b))*100 nPV[c_, d_] := (d/(c + d))*100 Solve[{sens == sensitivity[a, c], spec == specificity[b, d], ppv ==... |
| In case you want more (here 15) contours and you know minf and maxf, the minimum and maximmum value for your contours you could for example use n = 15; minf = -4; maxf = 4; cons = Table[minf + (j - 1) (maxf - minf)/(n - 1), {j,... |