GET:GPLOT_keywords:x-axis
Default value: XAXIS = 1.0
XAXIS controls whether or not the x-axis is drawn.
XAXIS = 1.0 - draw the x-axis
XAXIS = 0.0 - do not draw the x-axis
If BOX is not equal to 0, then the bottom of the axis box will
be drawn, even if XAXIS =0.
Default value: %XLABSZ = 3.0
XLABSZ controls the size of the automatic text label for the
x-axis, set by the plot label 'XLABEL' using the command XLABEL.
There are two forms:
XLABSZ -- is the height, in world coordinate units,
of the character string labeling the x-axis
%XLABSZ -- is the height, expressed as a percentage
of the height of the GPLOT window,
that is, XLABSZ = %XLABSZ*(YUWIND-YLWIND)/100.
Default value: %XLAXIS = 12.0
XLAXIS controls the position of the left, or lower, end of the
x-axis. This is also the horizontal coordinate of the lower left
hand corner of the graph box, if BOX = 1.0. There are two forms:
XLAXIS -- is the horizontal coordinate, in world
coordinate units, of the left end of the x-axis
%XLAXIS -- is the horizontal coordinate, expressed as a
percentage of the width of the GPLOT window,
that is, XLAXIS = XLWIND+%XLAXIS*(XUWIND-XLWIND)/100.
Default value: %XUAXIS = 94.0
XUAXIS controls the position of the right, or upper, end of the
x-axis. This is also the horizontal coordinate of the upper
right hand corner of the graph box, if BOX = 1.0. There are two
forms:
XUAXIS -- is the horizontal coordinate, in world
coordinate units, of the right end of the x-axis
%XUAXIS -- is the horizontal coordinate, expressed as a
percentage of the width of the GPLOT window,
that is, XUAXIS = XLWIND+%XUAXIS*(XUWIND-XLWIND)/100.
Default value: XAXISA = 0.0
XAXISA is the angle, in degrees, measured counterclockwise,
between a horizontal line and the x-axis.
Default value: XLOG = 0.0
XLOG determines whether the x-axis is to be linear or
logarithmic.
XLOG > 1.0 - the x-axis will have a logarithmic scale.
The base will be the integer part of XLOG,
except for the special case:
1.05*e > XLOG > 0.95*e,
where e is the base of the natural logarithms,
e = 2.718281828, in which case the base will
be e. The numbers labeling the x-axis will be
in exponent form.
-1.0 <= XLOG <= 1.0 - the x-axis will have a linear scale
XLOG < -1.0 - the x-axis will have a logarithmic scale.
The base will be the integer part of |XLOG|,
except for the special case:
-1.05*e < XLOG < -0.95*e, in which case the
base will be e. The numbers labeling the x-axis
will be in full digit form.
If |XLOG| > 1.0, then XMIN and XMAX are assumed to be the
exponents for the minimum and maximum values on the x-axis. The
maximum value displayed on the x-axis is |XLOG|**XMAX and the
minimum value displayed on the x-axis is |XLOG|**XMIN. Integer
exponents are always used for the axis numbering, so the x-axis
may not begin and/or end on a large tic mark.
If |XLOG| = 10.0, the small tic marks on the x-axis can be
specified exactly with NSXINC. If small tic marks are desired
at the locations j*10**n, where 2 <= j <= 9, then set NSXINC =
-j. For example, if you want small tic marks at 2*10**n,
4*10**n, 5*10**n, and 8*10**n, then set NSXINC = -2458.
If |XLOG| <= 1.0, XMIN and XMAX are the actual minimum and
maximum values for the x-axis; and the x-axis always begins and
ends on large tic marks.
Default value: NXGRID = 0.0
NXGRID controls the number of grid lines parallel to the
y-axis. NXGRID specifies the number of large x-axis tic marks
between each grid line.
NXGRID > 0.0 - draw a grid line parallel to the y-axis at
every NXGRID large tic mark, starting with the
first
NXGRID = 0.0 - suppress all grid lines parallel to the y-axis
NXGRID = -1.0 - draw a grid line parallel to the y-axis at
every x-axis tic mark, large and small.
This option applies only if the axes are orthogonal.
Default value: XCROSS = 0.0
XCROSS controls where the y-axis is to cross the x-axis. The
axes always cross at a large tic mark.
XCROSS = 0.0 - the y-axis will cross the x-axis at XMIN
XCROSS = 1.0 - the y-axis will cross the x-axis at x = 0.0,
or at the large tic mark closest to x = 0.0
Default value: XZERO = 0.0
XZERO controls whether or not to force zero to be displayed on
the x-axis. XZERO is set to zero after each call to GPLOT.
XZERO = 1.0 - if XMIN >= 0.0 then set XMIN to zero,
or, if XMAX <= 0.0 then set XMAX to zero
XZERO = 0.0 - do not force zero to be displayed on the
x-axis
Default value: XTICTP = 1.0
XTICTP controls the type of tic marks to place on the x-axis.
XTICTP = 1.0 - tic marks are drawn on only one side of
the x-axis. XTICA controls the side on which
the tic marks will appear
XTICTP = 2.0 - tic marks are drawn on both sides of
the x-axis
Default value: XTICA = YAXISA - XAXISA +180
XTICA controls the angle of the tic marks, both large and
small, on the x-axis. XTICA is the angle, in degrees, measured
counterclockwise, between the x-axis and a tic mark. By default,
XTICA is set as a percentage.
If XTICA is set as a percentage, for example, SET %XTICA 0,
then XTICA is set to YAXISA-XAXISA+180. The actual value of
%XTICA will be ignored. This allows the user to change the
angle of the axes and keep the x-axis tic marks parallel to the
y-axis.
Default value: NLXINC = 5.0
NLXINC controls the number of large tic marks to be displayed on
the x-axis.
NLXINC < 0.0 - the number of large tic marks on the x-axis will
be NLXINC + 1. If XLOG > 1, logarithmic x-axis,
NLXINC may be changed to avoid fractional powers.
If XLOG < 1, linear x-axis, the x-axis minimum and
maximum will not be labeled with numbers.
NLXINC = 0.0 - the number of large tic marks on the x-axis will
be automatically determined for the user
The virtual x-axis minimum and maximum will be
determined, so the x-axis may not begin or end
at a large tic mark
NLXINC > 0.0 - the number of large tic marks on the x-axis will
be NLXINC + 1. If XLOG > 1, logarithmic x-axis,
NLXINC may be changed to avoid fractional powers.
If XLOG < 1, linear x-axis, NLXINC will not be changed.
Default value: %XTICL = 2.0
XTICL controls the length of the long tic marks on the x-axis.
There are two forms:
XTICL -- is the length of the long x-axis tic
marks in world coordinate units
%XTICL -- is the length, expressed as a percentage
of the height of the GPLOT window,
that is, XTICL = %XTICL*(YUWIND-YLWIND)/ 100.
Default value: NSXINC = 5.0
NSXINC controls the number of small tic marks to be displayed on
the x-axis. The small tic marks appear between the large tic
marks.
NSXINC <= 1.0 - no small tic marks on the x-axis
NSXINC >= 2.0 - the number of small tic marks, on the x-axis,
between each pair of large tic marks, will
be NSXINC-1
If |XLOG| = 10.0, the small tic marks on the x-axis can be
specified exactly with NSXINC. If small tic marks are desired
at the locations j*10**n, where 2 <= j <= 9, then set NSXINC = -j.
For example, if you want small tic marks at 2*10**n,
4*10**n, 5*10**n, and 8*10**n, then set NSXINC = -2458.
Default value: %XTICS = 1.0
XTICS controls the length of the short tic marks on the x-axis.
There are two forms:
XTICS -- is the length of the short x-axis tic
marks in world coordinate units
%XTICS -- is the length, expressed as a percentage
of the height of the GPLOT window,
that is, XTICS = %XTICS*(YUWIND-YLWIND)/100.
Default value: XAUTO = 2.0
XAUTO controls the autoscaling of the x-axis. XAUTO is ignored
if the GPLOT parameter IAXIS = 2, that is, if only the data
points are to be plotted and not the axes. XAUTO is set to zero
after each call to GPLOT.
XAUTO = 2.0 - determine XMINN and XMAX so that all the data
points passed to GPLOT in the X and Y arrays
appear on the graph, also determine
NLXINC, XPOW, NXDIG and NXDEC.
Do not set XPAUTO to 1.0 or 2.0 after setting
XAUTO to 2.0
XAUTO = 1.0 - determine XMIN and XMAX only
XAUTO = 0.0 - do not autoscale the x-axis, that is, use the
current values for XMIN and XMAX
If XMIN = XMAX, then XMIN and XMAX will be determined from the
X and Y arrays passed to GPLOT, just as if XAUTO had been set
to one.
Default value: XMAX = 10.0
XMAX controls the maximum value to be displayed on the x-axis.
If |XLOG| > 1.0, then XMAX is assumed to be the exponent for the
maximum value on the x-axis. The maximum value displayed on the
x-axis is |XLOG|**XMAX. Integer exponents are always used for
the axis numbering, so the x-axis may not end on a large tic
mark. If |XLOG| <= 1.0, then XMAX is the actual maximum value
for the x-axis, and the x-axis always ends on a large tic mark.
Default value: XVMIN = 0.0
XVMIN controls the virtual minimum value for the x-axis. If XVMIN
is less than XMIN, the actual x-axis minimum value will be XMIN,
while the large, or numbered, tic marks will begin at XVMIN, which may
be `off the end' of the x-axis. XVMIN is always set to XMIN whenever
XMIN is set, so you must set XVMIN after XMIN.
Default value: XVMAX = 10.0
XVMAX controls the virtual maximum value for the x-axis. If XVMAX
is greater than XMAX, the actual x-axis maximum value will be XMAX,
while the large, or numbered, tic marks will end at XVMAX, which may
be `off the end' of the x-axis. XVMAX is always set to XMAX whenever
XMAX is set, so you must set XVMAX after XMAX.
Default value: XMIN = 0.0
XMIN controls the minimum value to be displayed on the x-axis.
If |XLOG| > 1.0, then XMIN is assumed to be the exponent for the
minimum value on the x-axis. The minimum value displayed on the
x-axis is |XLOG|**XMIN. Integer exponents are always be used for
the axis numbering, so the x-axis may not begin on a large tic
mark. If |XLOG| <= 1.0, XMIN is the actual minimum value for the
x-axis, and the x-axis always begins on a large tic mark.
Default value: XVMIN = 0.0
XVMIN controls the virtual minimum value for the x-axis. If XVMIN
is less than XMIN, the actual x-axis minimum value will be XMIN,
while the large, or numbered, tic marks will begin at XVMIN, which may
be `off the end' of the x-axis. XVMIN is always set to XMIN whenever
XMIN is set, so you must set XVMIN after XMIN.
Default value: XMOD = 0.0
XMOD is another control on the numbering for the x-axis.
XMOD > 1.0 - the numbers displayed on the x-axis are
modulo XMOD and positive. If the number
to be displayed on the axis is x then
the number that is actually displayed is
|x-XMOD*(x/XMOD)|+XOFF
-1.0 <= XMOD <= 1.0 - the numbers will be displayed normally
XMOD < -1.0 - the numbers will be modulo |XMOD| and
may be negative
Default value: XOFF = 0.0
XOFF is another control on the numbering for the x-axis. If
|XMOD| > 1, then XOFF is added to the numbers to be displayed on
the x-axis. If |XMOD| <= 1, then XOFF is ignored.
Default value: XLEADZ = 0.0
XLEADZ controls whether leading zeros are displayed on the
x-axis numbers.
XLEADZ = 1.0 - numbers displayed on the x-axis will have leading
zeros if they are between 0 and 1
XLEADZ = 0.0 - numbers displayed on the x-axis will not
have leading zeros if they are between 0 and 1
The default is to not display these leading zeros. Numbers that
are between -1 and 0 always have the leading zero displayed.
Default value: XPAUTO = 1.0
XPAUTO, along with XPOW, controls the x-axis scale value that
is appended to the x-axis text label, XLABEL. This scale
value is needed when there are not enough digits allowed for
the numbers labeling the x-axis.
XPAUTO = 2.0 - determine XPOW, but do not append the scale value
to the character label even if it is needed
XPAUTO = 1.0 - determine XPOW, and append the scale value to the
character label
XPAUTO = 0.0 - use the present value of XPOW, if XPOW is not equal
to 0, append the scale value to the character label
If the user wishes to completely specify the appearance of the
x-axis, XPAUTO must be set to 0.0, otherwise the number of
digits and decimal places, NXDIG and NXDEC, may be changed.
Default value: XPOW = 0.0
XPOW controls the x-axis scale value that is appended to the
x-axis text label, XLABEL. automatic label This scale value is
a power of ten, that is, 10**XPOW, and the numbers labeling the
x-axis should be multiplied by this scale value to get the
correct graph units.
Default value: NXDIG = 5.0
NXDIG controls the total number of digits to be displayed in
each of the numbers labeling the x-axis. If NXDIG is smaller
than required to display the x-axis numbers, NXDIG will not be
increased, but a scale value, 10**n, will be appended to
XLABEL, the x-axis text label. If NXDIG is larger than required,
NXDIG will be reduced to the minimum value required. The value
of NXDIG is updated after each call to GPLOT.
Default value: NXDEC = -1.0
NXDEC controls the number of digits to be displayed in the
fractional parts of the numbers labeling the x-axis. The value
of NXDEC is updated after each call to GPLOT.
NXDEC = -1.0 - display the numbers labeling the x-axis as
integers, with no decimal point
NXDEC = 0.0 - display the numbers labeling the x-axis with no
fractional part, but with a decimal point
NXDEC > 0.0 - display the numbers labeling the x-axis with
NXDEC digits in the fractional part
Default value: %XNUMSZ = 2.0
XNUMSZ controls the size of the numbers labeling the x-axis.
There are two forms:
XNUMSZ -- is the height of the numbers, in world
coordinate units
%XNUMSZ -- is the height, expressed as a percentage of
the height of the GPLOT window, that is,
XNUMSZ = %XNUMSZ*(YUWIND-YLWIND)/100.
Default value: XNUMA = -XAXISA
XNUMA controls the angle of the base line for the numbers
labeling the x-axis. XNUMA is the angle, in degrees, measured
counterclockwise, between a line parallel to the x-axis and the
base line of a number. By default, XNUMA is set as a percentage.
If XNUMA is set as a percentage, for example, SET %XNUMA 0 then
XNUMA is set to -XAXISA. The actual value of %XNUMA will be
ignored. This allows the user to change the angle of the x-axis
and keep the base line of the x-axis numbers horizontal.
Default value: XITICA = YAXISA-XAXISA+180
XITICA, along with XITICL, controls the location of the numbers
labeling the x-axis at the large tic marks. XITICA is the
angle, in degrees, measured counterclockwise, between the
x-axis and a line joining the base of each large tic mark on
the x-axis to the centre of the number labeling that tic mark.
By default, XITICA is set as a percentage.
If XITICA is set as a percentage, for example, SET %XITICA 0
then XITICA is set to YAXISA-XAXISA+180. The actual value of
%XITICA will be ignored. This allows the user to change the
angle of the axes and keep the relative locations of the x-axis
numbers the same.
Default value: %XITICL = 3.0
XITICL, along with XITICA, controls the location of the numbers
labeling the x-axis at the large tic marks. There are two
forms:
XITICL -- is the distance, in world coordinate units,
measured from the base of each large tic mark
on the x-axis, to the centre of the number
labeling that tic mark
%XITICL -- is the distance, expressed as a percentage of
the height of the GPLOT window, that is,
XITICL = %XITICL*(YUWIND-YLWIND)/100.