i have this problem with gap between Y axis changed when different data is being enter.
First: the third data point is close with other points
Second: the third data point is slightly further
Third: the third data point is even further from the other points
Somehow i change expandRangeByFactor then different kind of gap will appear between each Y axis line.
I wonder how can i have the Y axis gap being fix(not affected by the data that i've put in)?
Thanks
Don't change the yRange of the plot space. Be aware that methods like -scaleToFitPlots: and user interaction (scrolling, zooming) can change the ranges, too.
Related
I have this x y data:
I would like to increase the density of points by closing small gaps. How do i go about. I still want to preserve the structure of the points.
It depends on what you mean by 'closing gaps'.
if you mean that you want to make the data seem more grouped without actually adding more data points, then you might find the 'LineWidth' argument to be useful. If used currectly it increases the width of each marker in the scatter plot, which will make the data seem more grouped and with less gaps.
to use it, write the scatter code line as follows:
scatter(X, Y, 'LneWidth', width_number)
replace 'width_number' with different values and see the effect.
I'm using GUIDE to display a plot within an axis that contains two data sets: the original signal and the average of the signal, but for some reason it seems to only plot one.
The axis is designated as m_graph and the data sets are avg and signal, which both share time.
plot(handles.m_graph, time,signal)
hold on
plot(handles.m_graph, time, avg)
When I compile the program, only the average is plotted. It seems to skip over the original signal or reset the axis. I've tried plotting just the signal so I know the data is fine.
I feel like I am missing something, maybe the set function?
Sorry my reasoning was a bit wrong; it applies to the current selected axes (it does not parent to the Figure).
However, using axes(h) followed by hold on or just hold(h,'on') will either switch the focus to the axes then turn hold on or turn hold on for a specified axes, respectively.
I am trying to display data in a matrix using imagesc() function but it is showing row index in decreasing order (Assuming origin at left-bottom). Any idea what mistake i could be making or how to correct this?
The matrix only has zeros and ones in it.
Set Ydir property of the current axes to normal
By default, imagesc uses reverse for YDir
set(gca,'YDir','normal');
See Documentation for Axes properties
Before:
After:
Note: This completely flips the inside data as well (it supposed to). As you are dealing with matrices, I hope this is what you want.
If you don't want to affect inside data, you need to change order of YTickLabels instead.
There's another option which requires slightly less code:
axis ij
Reverse the coordinate system so that the y values increase from top to bottom.
As in this case (as it is already reversed), you could use
axis xy
To get back to normal, so that y values increases from bottom to top.
As mentioned in the docs of axis.
I have created a scatter graph with three plot spaces. One for two y-axis each and one for the x-axis. I am able to show data for both y-axis. However now i want to move only the data,i.e. two line and not the two y-axis.Only the data and x-axis should move.
I have tried allowUserinteraction property. However is I enable it for x-axis, x axis moves without the data. If i enable it for both/either of axis, y axis also moves with data and scale of y-axis is not visible all the time. Can someone help pleas.e This is my first work with core plot.
I will add code if required.
Thanks
Since each plot space has both x and y ranges, I would just use two plot spaces for this situation. Use the same xRange for both plot spaces and assign the x-axis to one of them.
The easiest way to make them scroll only in the X direction is to set the globalYRange to the same range as the yRange for both plot spaces. Set allowsUserInteraction to YES for both plot spaces. If you need to change the yRange later, set the globalYRange to nil before you change the yRange and reset it afterwards. If you ever update the X range manually, be sure to always set it on both plot spaces.
I'm using Core-Plot on my iPhone app.
I need all the records data to be viewed without moving the plot space (the user interaction with the graph is set to NO).
The problem is that the values on my X axis are spread beyond the visible view, and can only be seen when moving the graph.
How can I make the values closer on my X axis?
10x
You need to adjust the xRange of your plot space. Similar to NSRange, plot ranges are given as a starting location and length, which can be negative. Look at the Core Plot sample programs for numerous examples.