iwanttomakeascatterplotwithpythonmatplotlibwherethecolorofthedotshouldcorrespondwithaparticularstringfromadatafile，sosomethithion
data=NP.genfromtxt (' filename.txt '，delimiter='，'，dtype=None，names=['a '，' b '，' c']
PLT.scatter (数据(a )、数据(b ) ) )
wherebythefirstcolumnofthefile ' a ' isafloat，the second column ' b ' isafloatandthethirdcolumn ' c ' isastring.thestringcolon
解决方案
somethingalongtheselinesshoulddothetrick :
color_dict={ 'Allan':'red '，' Betty':'blue '，' Chris':'black '，' Diane':'green '，
PLT.Scatter(data['a']，data['b']，color=[ color _ dict [ I ] fori in data [ ' c ' ] ] )