I want to create a polarplot() on which I want to plot custom bitmaps/images as marker.
Also, I want to animate the polarplot() by updating these marker's location in regular time intervals(500milliseconds).
Please see the below attached image to get an idea what I want.
SamplePlotExample.jpg
I have made a similar application using 'polar()' and 'imagesc()'.
But I feel 'polarplot()' is better and recommended by Matlab.
Also there are so many customization options available with polarplot().
But I am unable to use imagesc() with polarplot because of some polar coordinate-to-cartersian coordinate conversion problem.
Pleas give solution.
Is there any other better methods to follow?
Related
I am desiging a simple GUI application in Matlab using GUIDE.
I am displayed a number of axis - and I would like to add some simple design elements to make the interface clearer. I would like to draw a colored rectangle around an axis (seperate from the axis)... there are two such axes, each displaying details of some things shown in a third plot, and I would like this color clue to link the details to the overview.
So is it possible to add simple geometric shape objects to a Matlab GUI? I don't see anything but controls in GUIDE but perhaps its possible to add them manually with an explicit command?
It is generally difficult to draw any random shape. Except Square & rectangle, for which you can create panels and change the properties like BorderWidth and HighlightColor.
Since MATLAB GUI is based on Java, you can create any object in MATLAB GUI which can be created in Java. You can refer to this website [1] for further learning.
[1] http://undocumentedmatlab.com/matlab-java-book/
I'm a newbie to Matlab. I'm basically attempting to manually segment a set of images and then manually label those segments also. I looked into the imfreehand(), but I'm unable to do this using imfreehand().
Basically, I want to follow the following steps :
Manually segment various ROIs on the image (imfreehand only lets me draw one segment I think?)
Assign labels to all those segments
Save the segments and corresponding labels to be used further (not sure what format they would be stored in, I think imfreehand would give me the position and I could store that along with the labels?)
Hopefully use these labelled segments in the images to form a training dataset for a neural network.
If there is some other tool or software which would help me do this, then any pointers would be very much appreciated. (Also I am new to stackoverflow, so if there is any way I could improve on the question to make it clearer, please let me know!) Thanks!
Derek Hoiem, a computer vision research at the University of Illinois, wrote an object labelling tool which does pretty much exactly what you asked for. You can download it from his page:
http://www.cs.illinois.edu/homes/dhoiem/software/index.html
I'm making an iPhone app that uses Core Plot at one point in the application. I'm drawing a graph using a CPTScatterPlot and along the line I have CPTPlotSymbol plot symbols.
the graph is looking really good after some customizing but what I want to do is give the user a bit better visual representation of where exactly on the graph the current material is referring to.
I would like to "highlight" individual plot symbols along my line. I have the location on the xAxis of the point I want to manipulate. I have not been able to find any example of this or even a suggestion that it's possible, it seems to be possible for pie charts and bar plots though.
If it is not possible to change or manipulate the actual plot symbol at a point I'm quite happy to simply draw something over the symbol. If so, is there a way to get the x,y coordinates (in relation to the screen) of each plot symbol? Or will I have to calculate that from my data? My data varies a_lot so I'm simply auto resizing the plot area at the moment.
thanks!
You can implement the -symbolForScatterPlot:recordIndex: datasource method to customize the plot symbol at each point. Return nil if you don't want a symbol drawn at the given index. The Mac version of CPTTestApp (in the Core Plot examples folder) has a plot symbol demo that shows how to use this method.
My question is that how do I change the polygons of a map from shp file (shapefile) while using matlab. I was doing this project where i was given map in shpfile format that I need to use on, I am able to read the map in matlab but the map is divide in regions and each regions have its color, my problem I met was to change the polygons to its respective colors, anyone sees this please kindly help and reply me asap.
Are you using the Mapping Toolbox by The MathWorks, or third-party codes such as ones from the Shapefile C Library to import the shapefile? If you are using the Mapping Toolbox, I cannot be of much help here as I do not have that toolbox -- hopefully, someone else can help here.
In any case, if you could import the shapefile on to your MATLAB Workspace, you should be able to find the vector data (polygons and attributes data, etc.) somewhere...
If you do not see anything on the Workspace, possibly you can find those data in the Figure (or in the Axis).
data=get(the_handle);
I would look for the data there.
After you obtain the polygon and properties data, you can patch/fill them with any color you like (based on any other information you find there.)
Good Luck
I want to use core-plot for drawing line graph dynamically. data won't come at a time, we will be receiving point by point dynamically.
Is it possible to draw the chart dynamically using core-plot i.e drawing point by point as on when we receive the (x,y) point?
Please help me, Thanks.
Yes, you can do this reasonably easily. For each received data point, append it to an array of values to display. As these data points come in, call -reloadData on the Core Plot graph (or just the particular plot) to redraw the graph, passing in the array you just added a value to in response to the -numbersForPlot:field:recordIndexRange: delegate method.
If you need to adjust the plot range to track your data points (for a moving ticker), recalculate the new CPPlotRange for the X axis and set the plot space's xRange property to that.
Use the CPTestApp-iPhone, AAPLot, or StockPlot examples as templates for how to set up the line chart overall, and modify from that starting point.
I do something similar to this on the Mac in a scientific application:
(source: sunsetlakesoftware.com)
Sounds like you could make use of a demo project I put together and wrote about here (not core plot related though).
It draws a EKG graph but should easily be modified to use another input than the repeated "heart beat"...See line 320 in EAGLView.m where the indata is entered into the array.