ó Ń%Tc@s-dZddlmZddd„ƒYZdS(sCA class to perform linear interpolation on data read from csv file.i˙˙˙˙(tfloort LinearInterpcBs eZdZd„Zd„ZRS(sCA class to perform linear interpolation on data read from csv file.cCsžd|_d|_d|_g|_||_t|dƒ}|jƒ|jƒjdƒ}t|dƒ|_|jj t|dƒƒ|jƒjdƒ}t|dƒt|jƒ|_|jj t|dƒƒ|jd}xŠ|D]Ą}t |j ƒƒdkrqën|jdƒ}|j|jt |jƒ}|||dkrr|d||krrd|jGHn|jj t|dƒƒqëW|j ƒdS(sUInitialize the class and read data from the specified a file name. ARGUMENTS: fileName - the name of the CSV data file. This CSV file should have two columns: x and y, as well as a header row (which will be ignored). RETURNS: an initialized LinearInterp object trt,iii'sIncorrect step size in file N( tNonet_LinearInterp__xStartt_LinearInterp__xStept_LinearInterp__fileNamet_LinearInterp__yDatatopentreadlinetsplittfloattappendtlentrstriptclose(tselftfileNametinputtcurdatateptcurlinetxVal((sZ/public2/ftp/pub/ccp4/6.5/ccp4-6.5/lib/python2.7/site-packages/coot/rcrane/linearInterp.pyt__init__s.         (cCs6tt||j|jƒƒ}d}|dkrv|jd|jd}||j|j}|jd||}nź|t|jƒdkrä|jd|jd}||j|jt|jƒd}|jd||}nN||j|j|}|j|d||j|j|d||j}|S(súDetermine the interpolated (or extrapolated) y value for the given x value ARGUMENTS: xVal - the x value to determine the y value for RETURNS: yVal - the interpolated (or extrapolated) y value iii˙˙˙˙iţ˙˙˙N(tintRRRRRR(RRtxPostyValtySteptnumStepst remainder((sZ/public2/ftp/pub/ccp4/6.5/ccp4-6.5/lib/python2.7/site-packages/coot/rcrane/linearInterp.pytinterpIs  %6(t__name__t __module__t__doc__RR(((sZ/public2/ftp/pub/ccp4/6.5/ccp4-6.5/lib/python2.7/site-packages/coot/rcrane/linearInterp.pyRs 2N((R"tmathRR(((sZ/public2/ftp/pub/ccp4/6.5/ccp4-6.5/lib/python2.7/site-packages/coot/rcrane/linearInterp.pyts