I want to make a fixed-size plot.
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The area in which gnuplot draws a graph depends on axis and ticlabels. To fix the size of the graph, you need to adjust margins by set margin . An option ofthis command is the number of letters. There are fourkinds of margin, top (tmargin), bottom (bmargin), left (lmargin), andright (rmargin). As the defaults all margins are calculatedautomatically. Current setting can be displayed by:
The next shows an example in the case that all marginsare given manually.
When the margins are defined explicitly like above,the size of graph does not change even formats of the X and Ytics are changed.
To fix the position of axis labels, specify the offset optionsof set {x|y}label command.
I want to use both sides of Y-axes.
It sometimes happens that one wants to put several graphs in oneplot. With gnuplot you can use top and bottom axes, and left andright axes separately.
As the defaults Y2 axis is the same as the Y (left) axis. Let'smake those two axes different, and plot sin(x) and its square at thesame time. An option of axis in the plot commanddefines which axis is used for scaling. The syntax is axis + x1y1, x1y2, x2y1, x2y2. For example axis x1y2 means thatthis function or data will be scaled by the bottom X-axis and theright Y-axis.
In this case the tics on the right axis is the same as thoseon the left axis. To make those different one can use a nomirror option to the set ytics command, and set y2tics makes different axis on the right border.
When you use the both axes, you need to specify which axis is usedfor each data. An arrow is often usedfor this purpose. This can be done by set arrow .
I want to erase axes.
Gnuplot draws top, bottom, left, and right frames. To erase thoseframes, use set border n . An integer is assignedfor each frame line, the bottom is 1, left 2, top 4, and right 8. Theoption n is the sum of those integers. For example, only X1axis is shown if n=1, X1 and Y1 axes for n=3, all four border linesfor n=31. The set border command only affects the borderlines, so that tics remain even if n=0. In order to erase axes,you need set no{x|y}tics or set {x|y}tics nomirror.The following example shows how to erase the top and rightborder.
E Plot Size - Image Results
I want to draw a square or fixed aspect ratio figure.
This subject had been known for the old version gnuplotas a very difficult matter, but it is supported nowadays.To make a square plot, give an option square to the set size command.
E Plot Size
Similarly, to fix the aspect ratio:
Cached
In this case the Y axis length is two times longer than theX axis. This ratio is independent of the values of the X and Y axes.In order to set the scales so that the unit has the same length onboth the X and Y axes, give negative value for the ratio. If theratio is -1, the unit length for the X axis is the same as thatfor the Y axis. If -2, the Y axis becomes two times longer.
Light Plot Software
square |
ratio -1 | ratio -2 | ratio -4 |
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