Axis properties

Xlim

plt(...,'Xlim',[xmin xmax]);
Specifies the x-axis limits. If you are using a 2 column subplot, you can specify the x-limits for both both columns by using a cell array. i.e. 'Xlim',{[xminL xmaxL] [xminR xmaxR]}  If you want to specify just the right column limits, replace the left column limits with the string 'default' .
 

Ylim

plt(...,'Ylim',[ymin ymax]);
Specifies the y-axis limits for the left-hand y axis of the main plot. Alternatively you may specify the limits for the main plot left and right hand y-axes using a cell array input as in: 'Ylim',{[ymin ymax] [yminR ymaxR]}. The 'Right' parameter should also be included in this case, however if you don't, plt will default to placing the last trace on the right hand axis. Note that this parameter only specifies limits for the main plot and never for any of the other subplots. If you need to set the y-axis limits for the other subplots, use the set command with the axis handles obtained from getappdata(gcf,'axis').
 

YlimR

plt(...,'YlimR',[ymin ymax]);
Although this is most often done with the Ylim parameter (above) you may also specify the limits for right-hand y axis using the YlimR parameter. The 'Right' parameter should also be included in this case, however if you don't, plt will default to placing the last trace on the right hand axis.
 

AxisPos

plt(...,'AxisPos',p);
p is a 4 element vector that modifies the size and position of the plot axis in the figure window. The first two elements modify the x and y coordinates of the lower left corner of the axis. The last two elements modify the axis width and height respectively. For example if p = [1 1 .9 1], the width of the plot will shrink by 10%. If p = [1 2 1 .8] then the space between the bottom of the figure window and the bottom of the x-axis will double and the plot height will shrink by 20%. Changing the size and position of the axis is often useful when building applications to make room for additional GUI objects. If p is a 5 element vector, the width of the trace ID box is increased by a factor of p(5) to allow longer trace names. If p is an 8 element vector, the position of the trace ID box (xLeft,yBottom,width,height) is multiplied by last four elements of p (i.e. p(5:8))
 

NewLimit
axisCB   

plt(...,'NewLimit',s);
plt(...,'axisCB',s);
Evaluate string s when either the x or y-axis limits are changed. These two terms (NewLimit and axisCB) are synonymous. This callback function can be overwritten by the cursor command plt('cursor',cid,'set','axisCB',fcn) which is described in more detail in the cursor commands section. In addition to a string, s may also be a function handle of the form @func or {@func,arg1,arg2,...,argn}. Note that the string substitutions can't be used with the function handle form of this parameter.
 

moveCB

ENApre

plt(...,'ENApre',[ENAx ENAy]);
       ENAx or ENAy = 0 to disable metric prefixes on the x/y axis.
       ENAx or ENAy = 1 to enable metric prefixes on the x/y axis (default).
When metric prefixes are enabled plt will choose the best unit for the respective axis. As an example, suppose the x-axis label is 'seconds' and the x-axis data is [0 1 2 3 4 5]*1e-8. With metric prefixes disabled, the x-axis tick-labels and cursor readout will be in scientific notation. With metric prefixes enabled, the x-axis label will change to "nano-seconds" and scientific notation will no longer be required making the graph and cursors far more readable. (Note: metric prefixes are not used on the right hand axis).
 

AxisLink

+AxisProp
-AxisProp
<LabelProp
>LabelProp
.LabelProp

plt(...,'+Ycolor',[0 0 1],'-Yscale','Log'); In this example plt will assign the value [0 0 1] (blue) to the Ycolor property of the main (left hand) axis, and it will apply the value 'Log' to the Yscale property of the right hand axis. The plus and minus signs are called a property prefix characters and  are required so that plt knows which axis you want to modify.

plt(...,'>FontName','Lucida Handwriting'); In this example the font used for the right hand axis label is changed to Lucida Handwriting.

More than one property prefix character may be included in front of a property name. For example:

plt(...,'+<.FontSize',13); In this case, the font size for the left hand axis tick labels, the left y-label, and the x-label are increased to 13.

The example demo\pub.m demonstrates the use of these prefix characters. Note that if a property name appears without one of these 5 leading prefix characters (<>.+-), then property value will be assigned to all the lines that have been defined earlier in the argument list.
 

SubPlot

Single column
To create a single column of plots (all using the same x axis), the subplot argument consists of n positive numbers, where n is the number of plots desired. Each number specifies the percent of the area to be occupied by each plot (starting from the bottom). Normally the sum of the array should be 100, although if the sum is less than 100, there will be some unused space at the top of the figure. For example, 'SubPlot',[40 30 15 15] tells plt to create four plots. The bottom one (the "main" plot) will us up 40% of the available height. The plot above that will use 30% of the height, and the remaining two will take 15% each. Each subplot except the main (lower) plot is assigned a single trace, with the last trace defined appearing in the upper most axis, the second to last trace appearing in the axis below that, etc. For example, the command plt(1:50,rand(7,50),'SubPlot',[40 30 15 15]) will create 7 random traces, with the first four traces displayed on the main (lower) plot (with a traceID box containing four labels) and the last 3 traces are displayed in the other three subplots. The example script demo\subplt.m demonstrates the use of single column subplots. Usually only the main plot may contain multiple traces, although the SubTrace parameter (see below) allows you to change this behavior.

Dual column
The example script demo\subplt8.m demonstrates the use of dual column subplots. To create two columns of plots, insert a negative number into the subplot argument. The number of entries to the left of the negative number indicates how many plots will appear in the left column, and likewise, the number of entries to the right of the negative number indicates the number of plots in the right column. The negative number itself specifies the width (in percent) of the left column. Some examples will help clarify (assume y = [a b c d e f] where a,b,c... are column vectors):

plt(x,y,'SubPlot',[100 -60 100],'Right',[2 3]); The subplot parameters tells plt to create two plots both of which fill the entire height available in the plotting area of the figure. The left (main) plot fills 60% of the width with the second plot filling the remaining 40%. Since six traces are defined, the first five traces (a thru e) appear on the main plot and the last trace (f) appears on the right plot. Since the TRACEid parameter was not included, the trace ID box next to the main plot will contain the default trace labels (Line1 thru Line5). To label the traces more informatively, a parameter such as 'TRACEid',{'a' 'b' 'c' 'd' 'e'} could be added to the plt argument list. Since the 'Right' parameter was included, the main plot will include both right and left axes, with the 2nd and 3rd traces (b and c) on the right and the remaining three traces (a,d,e) on the left. The left and right axes will be separated by enough space to leave room for the axis labels, and this space will be increased when the 'Right' parameter is used so that there is room for an axis label on the right side of the main (i.e. left) axis. However if you would like to increase or decrease the amount of space between the two columns you can do this by modifying the width argument. As an example, suppose as above you still want the left plot to occupy 60% of the available width, but you want to increase the spacing between the two axes by 2.3% of the figure window width. To do that you would use 'SubPlot',[100 -60.023 100]. And for another example, if you wanted to decrease the spacing by 3% of the figure width you would use 'SubPlot',[100 -60.97 100].

plt(x,y,'SubPlot',[50 30 20 -55 70 20]); Three plots will be created in the left column which fills 55% of the width of the plotting area. The main plot on the bottom (containing traces a & b) fills 50% of the height, the middle plot (trace c) fills 30% and the top plot (trace d) fills the remaining 20% of the height. Two plots are created in the right column which fills the remaining 45% of the width. The lower of these (trace e) fills 70% of the height, and the upper (trace f) fills 20%, with the upper 10% remaining blank. Note that both traces in the main plot use the left-hand axis since no 'Right' parameter was given and no limits or labels were specified for the right-hand axis. (With this many subplots it's best not to use a right-hand axis since it makes all the subplots significantly narrower to make room for the right-hand axis ticks and labels.)

plt(x,y,'LabelX',{'meters' 'pascals'},'Ylim'{[0 5] [0 .1]}); Even though the subplot argument is not included here, plt will split the plot horizontally as if you had included 'SubPlot',[100 ­50 100] in the argument list. This is because two different x-axis labels are specified with the 'LabelX' parameter and the only time this is needed is for two column subplots. The right column plot will contain trace f and the left column (main) plot will contain traces a thru e. Since two y-axis limits are specified, plt will put both left and right axes on the main plot. In this example the 'Right' parameter is not included, so plt will default to putting the last trace of the main plot (trace e) on the right axis with the other four traces on the left axis. (Be careful not to confuse the concepts of the right and left axes of the main plot, with the right and left columns of subplots.) Also note that the 'Ylim' parameter only specifies limits for the main plot and never for any of the other subplots. If you need to set the y-axis limits for the other subplots, use the set command with the axis handles obtained from getappdata(gcf,'axis').
 

SubTrace

There are two ways to use this parameter to assign the traces to the various subplots. For either method you must know how plt numbers the axes. Axis number one is always the main axis (lower left). Then axis two is the one directly above the main axis and axis three is the one above that, continuing to the top of the left column. Then the lowest axis of the second column (if it exists) is assigned to the next number, and continuing upwards as before. Finally after all the subplots have been assigned a number in this manner, the right hand axis of the main plot (if it exists) is assigned to the next higher integer.

 Suppose for example, you have 4 axes and 9 traces and that you want to put two traces on each of the first 3 axes and then put the remaining 3 traces on the last axis. You could do this with 'SubTrace',[2 2 2 3]. Instead of specifying how many traces are on each axis, an alternate way of doing this is to specify which axis each trace goes on. So an equivalent to the previous parameter you could use 'SubTrace',[1 1 2 2 3 3 4 4 4]. Of course this second method is always going to be longer than the first method, so you would likely only use if you needed to assign the traces to the axes in a different order, for example 'SubTrace',[1 2 3 1 2 3 4 4 4].