# uproot.writing.identify.to_TH2x

Defined in uproot.writing.identify on line 1267.

uproot.writing.identify.to_TH2x(fName, fTitle, data, fEntries, fTsumw, fTsumw2, fTsumwx, fTsumwx2, fTsumwy, fTsumwy2, fTsumwxy, fSumw2, fXaxis, fYaxis, fZaxis=None, fScalefactor=1.0, fNcells=None, fBarOffset=0, fBarWidth=1000, fMaximum=-1111.0, fMinimum=-1111.0, fNormFactor=0.0, fContour=None, fOption='', fFunctions=None, fBufferSize=0, fBuffer=None, fBinStatErrOpt=0, fStatOverflows=2, fLineColor=602, fLineStyle=1, fLineWidth=1, fFillColor=0, fFillStyle=1001, fMarkerColor=1, fMarkerStyle=1, fMarkerSize=1.0)
  Parameters:

    - fName (None or str) – Temporary name, will be overwritten by the writing process because Uproot’s write syntax is `file[name] = histogram`.

    - fTitle (str) – Real title of the histogram.

    - data (numpy.ndarray or uproot.models.TArray.Model_TArray) – Bin contents with first bin as underflow, last bin as overflow. The dtype of this array determines the return type of this function (TH2C, TH2D, TH2F, TH2I, or TH2S).

    - fEntries (float) – Number of entries. (https://root.cern.ch/doc/master/classTH1.html)

    - fTsumw (float) – Total Sum of weights.

    - fTsumw2 (float) – Total Sum of squares of weights.

    - fTsumwx (float) – Total Sum of weight*X.

    - fTsumwx2 (float) – Total Sum of weight*X*X.

    - fTsumwy (float) – Total Sum of weight*Y. (TH2 only: https://root.cern.ch/doc/master/classTH2.html)

    - fTsumwy2 (float) – Total Sum of weight*Y*Y. (TH2 only.)

    - fTsumwxy (float) – Total Sum of weight*X*Y. (TH2 only.)

    - fSumw2 (None or numpy.ndarray of numpy.float64 or uproot.models.TArray.Model_TArrayD) – Array of sum of squares of weights. If None, a zero-length uproot.models.TArray.Model_TArrayD is created in its place.

    - fXaxis (uproot.models.TH.Model_TAxis_v10) – Use uproot.writing.identify.to_TAxis with `fName="xaxis"` and `fTitle=""`.

    - fYaxis (uproot.models.TH.Model_TAxis_v10) – Use uproot.writing.identify.to_TAxis with `fName="yaxis"` and `fTitle=""`.

    - fZaxis (None or uproot.models.TH.Model_TAxis_v10) – None generates a default for 1D and 2D histograms.

    - fScalefactor (float) – Scale factor. (TH2 only.)

    - fNcells (None or int) – Number of bins(1D), cells (2D) +U/Overflows. Computed from `data` if None.

    - fBarOffset (int) – (1000*offset) for bar charts or legos

    - fBarWidth (int) – (1000*width) for bar charts or legos

    - fMaximum (float) – Maximum value for plotting.

    - fMinimum (float) – Minimum value for plotting.

    - fNormFactor (float) – Normalization factor.

    - fContour (None or numpy.ndarray of numpy.float64 or uproot.models.TArray.Model_TArrayD) – Array to display contour levels. None generates an empty array.

    - fOption (str or uproot.models.TString.Model_TString) – Histogram options.

    - fFunctions (None, list, or uproot.models.TList.Model_TList) – ->Pointer to list of functions (fits and user). None generates an empty list.

    - fBufferSize (None or int) – fBuffer size. Computed from `fBuffer` if None.

    - fBuffer (None or numpy.ndarray of numpy.float64) – Buffer of entries accumulated before automatically choosing the binning. (Irrelevant for serialization?) None generates an empty array.

    - fBinStatErrOpt (int) – Option for bin statistical errors.

    - fStatOverflows (int) – Per object flag to use under/overflows in statistics.

    - fLineColor (int) – Line color. (https://root.cern.ch/doc/master/classTAttLine.html)

    - fLineStyle (int) – Line style.

    - fLineWidth (int) – Line width.

    - fFillColor (int) – Fill area color. (https://root.cern.ch/doc/master/classTAttFill.html)

    - fFillStyle (int) – Fill area style.

    - fMarkerColor (int) – Marker color. (https://root.cern.ch/doc/master/classTAttMarker.html)

    - fMarkerStyle (int) – Marker style.

    - fMarkerSize (float) – Marker size.

  This function is for developers to create TH2* objects that can be written to ROOT files, to implement conversion routines. The choice of TH2C, TH2D, TH2F, TH2I, or TH2S depends on the dtype of the `data` array.