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110 lines
3.3 KiB
Plaintext
110 lines
3.3 KiB
Plaintext
/************************************************************************
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* This file has been generated automatically from *
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* *
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* src/core/qgshistogram.h *
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* *
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* Do not edit manually ! Edit header and run scripts/sipify.pl again *
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************************************************************************/
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class QgsHistogram
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{
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%Docstring
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Calculator for a numeric histogram from a list of values.
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.. versionadded:: 2.9
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%End
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%TypeHeaderCode
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#include "qgshistogram.h"
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%End
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public:
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QgsHistogram();
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%Docstring
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Constructor for QgsHistogram.
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%End
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virtual ~QgsHistogram();
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void setValues( const QList<double> &values );
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%Docstring
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Assigns numeric source values for the histogram.
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\param values list of doubles
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%End
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bool setValues( const QgsVectorLayer *layer, const QString &fieldOrExpression, QgsFeedback *feedback = 0 );
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%Docstring
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Assigns numeric source values for the histogram from a vector layer's field or as the
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result of an expression.
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\param layer vector layer
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\param fieldOrExpression field name or expression to be evaluated
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\param feedback optional feedback object to allow cancelation of calculation
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:return: true if values were successfully set
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:rtype: bool
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%End
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double optimalBinWidth() const;
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%Docstring
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Calculates the optimal bin width using the Freedman-Diaconis rule. Bins widths are
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determined by the inter-quartile range of values and the number of values.
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:return: optimal width for bins
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.. seealso:: :py:func:`optimalNumberBins`
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.. note::
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values must first be specified using setValues()
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:rtype: float
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%End
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int optimalNumberBins() const;
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%Docstring
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Returns the optimal number of bins for the source values, calculated using the
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Freedman-Diaconis rule. The number of bins are determined by the inter-quartile range
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of values and the number of values.
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:return: optimal number of bins
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.. seealso:: :py:func:`optimalBinWidth`
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.. note::
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values must first be specified using setValues()
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:rtype: int
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%End
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QList<double> binEdges( int bins ) const;
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%Docstring
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Returns a list of edges for the histogram for a specified number of bins. This list
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will be length bins + 1, as both the first and last value are also included.
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\param bins number of bins
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:return: list of bin edges
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.. note::
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values must first be specified using setValues()
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:rtype: list of float
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%End
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QList<int> counts( int bins ) const;
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%Docstring
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Returns the calculated list of the counts for the histogram bins.
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\param bins number of histogram bins
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:return: list of histogram counts
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.. note::
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values must first be specified using setValues()
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:rtype: list of int
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%End
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};
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/************************************************************************
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* This file has been generated automatically from *
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* *
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* src/core/qgshistogram.h *
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* *
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* Do not edit manually ! Edit header and run scripts/sipify.pl again *
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************************************************************************/
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