techchart
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Not able to install techchart
While installing the package I get the following error
cpttrend.cpp:142:27: error: use of undeclared identifier 'PI' ret = double(n)/2log(2PI) + double(n)/2*log(variance) + double(n)/2; ^ 1 error generated. make: *** [cpttrend.o] Error 1 ERROR: compilation failed for package ‘techchart’
Kindly help