ChartDirector Ver 3.1 (PHP Edition Edition)

Axis.setDateScale

Usage

setDateScale(lowerLimit, upperLimit[, majorTickInc[, minorTickInc ]])

Description

Set the axis to use the given date scale.

Arguments

ArgumentDefaultDescription
lowerLimit(Mandatory)The lower bound of the axis, representing using one of the ChartDirector supported date format.
upperLimit(Mandatory)The upper bound of the axis, representing using one of the ChartDirector supported date format.
majorTickInc0Add major ticks to the axis, where the major ticks are separated by majorTickInc seconds. Each major tick will have an associated text label for the value if the axis at the tick.

The value 30 * 86400 will be assume to mean one month (which actually contains a variable number of seconds), and 60 * 86400 will be assumed to mean 2 months and so on. The value 360 * 86400 therefore means 12 months, or 1 year.

The default value of 0 means the major ticks will be automatically determined. In this case, the lowerLimit and upperLimit may be automatically adjusted to align with the ticks.

Use NoValue to disable major ticks.
minorTickInc0Add minor ticks to the x-axis, where the minor ticks are separated by minorTickInc seconds.

The value 30 * 86400 will be assume to mean one month (which actually contains a variable number of seconds), and 60 * 86400 will be assumed to mean 2 months and so on. The value 360 * 86400 therefore means 12 months, or 1 year.

The default value of 0 means no minor tick is used.

Return Value

None

© 2004 Advanced Software Engineering Limited. All rights reserved.
e data range is completely negative.

For a purely positive axis, the bottom end has "zero affinity". That means ChartDirector will tend to choose 0 as the bottom end because zero is a natural starting point for the axis. However, if the data range is too extreme (e.g. the data is in the range 10000 - 10005), it may be "unreasonable" to choose 0 as the axis starting point. In this case, ChartDirector will not use 0 as the axis starting point.

ChartDirector will determine that it is "unreasonable" to use 0 as the axis starting point if the data fluctuation (the difference between the maximum and minimum data values) is too small compare with the data value. ChartDirector test the "too small" condition using the formula:

maxDataValue * zeroAffinity < minDataValue

where zeroAffinity by default is 0.8.

Similar "zero affinity" mechanism applies to the top end of the axis for a purely negative axis. If the data range contains both positive and negative values, the zero point is always included.

The zeroAffinity argument of the setAutoScale method allows you to modify the zero affinity when performing auto-scaling. Zero affinity should be between 0 and 1. A large value encourages ChartDirector to start the axis from zero.

A zero affinity of 1 means the axis always includes the zero point. A zero affinity of 0 means that the axis is scaled purely according to the data range, without any preference for the zero point.

Note that zero affinity is ignored for log scale axis as log scale axis cannot contain 0.

Arguments

ArgumentDefaultDescription
topExtension0.1The top portion of the axis that no data point should fall into. For example, a value of 0.2 means no data value will fall within the top 20% of the axis. The topExtension must be between 0 to 1.
bottomExtension0.1The bottom portion of the axis that no data point should fall into. For example, a value of 0.2 means no data value will fall within the bottom 20% of the axis. The bottomExtension must be between 0 to 1.
zeroAffinity0.8The tendency of ChartDirector to include zero in the axis during auto-scaling. The value must be between 0 and 1. A large value encourages ChartDirector to start the axis from zero. A value of 1 means the axis always includes the zero point. A value of 0 means there is no preference for the zero point during auto-scaling.

Return Value

None

© 2004 Advanced Software Engineering Limited. All rights reserved.
tr>movMed(Self)Replace each element of the ArrayMath object by its moving median.movPercentile(Self)Replace each element of the ArrayMath object by its moving percentile.movMax(Self)Replace each element of the ArrayMath object by its moving maximum.movMin(Self)Replace each element of the ArrayMath object by its moving minimum.movStdDev(Self)Replace each element of the ArrayMath object by its moving standard deviation.movCorr(Self)Replace each element of the ArrayMath object by the moving correlation with another array or with itself.lowess(Self)Fit a curve through the data points in the ArrayMath object using the LOWESS algorithm.lowess2(Self)Fit a curve through the data points in the ArrayMath object using the LOWESS algorithm, where the spacing of the data points is supplied by the given array.result(Self)Get the content of the ArrayMath object as a normal array to be used in other ChartDirector API.max(Self)Get the maximum value of the elements of the ArrayMath object.min(Self)Get the minimum value of the elements of the ArrayMath object.avg(Self)Get the average value of the elements of the ArrayMath object.sum(Self)Get the total value of the elements of the ArrayMath object.med(Self)Get the median value of the elements of the ArrayMath object.percentile(Self)Get the required percentile value of the elements of the ArrayMath object.maxIndex(Self)Get the index of the maximum value element of the ArrayMath object.minIndex(Self)Get the index of the minimum value element of the ArrayMath object.
© 2004 Advanced Software Engineering Limited. All rights reserved.
(1059, '1999-03-01', '371', '635', '722');