QLogValueAxis#
The QLogValueAxis class adds a logarithmic scale to a chart’s axis. More…
Synopsis#
Functions#
def
base()def
labelFormat()def
max()def
min()def
minorTickCount()def
setBase(base)def
setLabelFormat(format)def
setMax(max)def
setMin(min)def
setMinorTickCount(minorTickCount)def
setRange(min, max)def
tickCount()
Signals#
def
baseChanged(base)def
labelFormatChanged(format)def
maxChanged(max)def
minChanged(min)def
minorTickCountChanged(minorTickCount)def
rangeChanged(min, max)def
tickCountChanged(tickCount)
Detailed Description#
A logarithmic scale is a nonlinear scale that is based on orders of magnitude, so that each tick mark on the axis is the previous tick mark multiplied by a value.
Note
If QLogValueAxis is attached to a series with one or more points with negative or zero values on the associated dimension, the series will not be plotted at all. This is particularly relevant when XYModelMappers are used, since empty cells in models typically contain zero values.
- class PySide6.QtCharts.QLogValueAxis([parent=None])#
- Parameters
parent –
PySide6.QtCore.QObject
Constructs an axis object that is a child of parent.
- PySide6.QtCharts.QLogValueAxis.base()#
- Return type
float
This property holds The base of the logarithm..
The value has to be greater than 0 and cannot equal 1.
- PySide6.QtCharts.QLogValueAxis.baseChanged(base)#
- Parameters
base – float
This signal is emitted when the base of the logarithm of the axis changes.
- PySide6.QtCharts.QLogValueAxis.labelFormat()#
- Return type
str
This property holds The label format of the axis..
The format string supports the following conversion specifiers, length modifiers, and flags provided by printf() in the standard C++ library: d, i, o, x, X, f, F, e, E, g, G, c.
If localizeNumbers is true, the supported specifiers are limited to: d, e, E, f, g, G, and i. Also, only the precision modifier is supported. The rest of the formatting comes from the default QLocale of the application.
See also
asprintf()
- PySide6.QtCharts.QLogValueAxis.labelFormatChanged(format)#
- Parameters
format – str
This signal is emitted when the format of axis labels changes.
- PySide6.QtCharts.QLogValueAxis.max()#
- Return type
float
This property holds The maximum value on the axis..
When setting this property, the minimum value is adjusted if necessary, to ensure that the range remains valid. The value has to be greater than 0.
- PySide6.QtCharts.QLogValueAxis.maxChanged(max)#
- Parameters
max – float
This signal is emitted when the maximum value of the axis, specified by max, changes.
- PySide6.QtCharts.QLogValueAxis.min()#
- Return type
float
This property holds The minimum value on the axis..
When setting this property, the maximum value is adjusted if necessary, to ensure that the range remains valid. The value has to be greater than 0.
- PySide6.QtCharts.QLogValueAxis.minChanged(min)#
- Parameters
min – float
This signal is emitted when the minimum value of the axis, specified by min, changes.
- PySide6.QtCharts.QLogValueAxis.minorTickCount()#
- Return type
int
This property holds The number of minor tick marks on the axis. This indicates how many grid lines are drawn between major ticks on the chart. Labels are not drawn for minor ticks. The default value is 0. Set the value to -1 and the number of grid lines between major ticks will be calculated automatically..
- PySide6.QtCharts.QLogValueAxis.minorTickCountChanged(minorTickCount)#
- Parameters
minorTickCount – int
This signal is emitted when the number of minor tick marks on the axis, specified by minorTickCount, changes.
- PySide6.QtCharts.QLogValueAxis.rangeChanged(min, max)#
- Parameters
min – float
max – float
This signal is emitted when the minimum or maximum value of the axis, specified by min and max, changes.
- PySide6.QtCharts.QLogValueAxis.setBase(base)#
- Parameters
base – float
This property holds The base of the logarithm..
The value has to be greater than 0 and cannot equal 1.
- PySide6.QtCharts.QLogValueAxis.setLabelFormat(format)#
- Parameters
format – str
This property holds The label format of the axis..
The format string supports the following conversion specifiers, length modifiers, and flags provided by printf() in the standard C++ library: d, i, o, x, X, f, F, e, E, g, G, c.
If localizeNumbers is true, the supported specifiers are limited to: d, e, E, f, g, G, and i. Also, only the precision modifier is supported. The rest of the formatting comes from the default QLocale of the application.
See also
asprintf()
- PySide6.QtCharts.QLogValueAxis.setMax(max)#
- Parameters
max – float
This property holds The maximum value on the axis..
When setting this property, the minimum value is adjusted if necessary, to ensure that the range remains valid. The value has to be greater than 0.
- PySide6.QtCharts.QLogValueAxis.setMin(min)#
- Parameters
min – float
This property holds The minimum value on the axis..
When setting this property, the maximum value is adjusted if necessary, to ensure that the range remains valid. The value has to be greater than 0.
- PySide6.QtCharts.QLogValueAxis.setMinorTickCount(minorTickCount)#
- Parameters
minorTickCount – int
This property holds The number of minor tick marks on the axis. This indicates how many grid lines are drawn between major ticks on the chart. Labels are not drawn for minor ticks. The default value is 0. Set the value to -1 and the number of grid lines between major ticks will be calculated automatically..
- PySide6.QtCharts.QLogValueAxis.setRange(min, max)#
- Parameters
min – float
max – float
Sets the range from min to max on the axis. If min is greater than max, this function returns without making any changes.
- PySide6.QtCharts.QLogValueAxis.tickCount()#
- Return type
int
This property holds The number of tick marks on the axis. This indicates how many grid lines are drawn on the chart. This value is read-only..
- PySide6.QtCharts.QLogValueAxis.tickCountChanged(tickCount)#
- Parameters
tickCount – int
This signal is emitted when the number of tick marks on the axis, specified by tickCount, changes.