1/22/2024 0 Comments Matlab subplot legend each![]() In my search for information on how the legend worked I found the undocumented Matlab article about generating dynamic legends. I couldn’t find the obvious culprit, stepping as far as I could through the print function there didn’t appear to be any call to the legend function. My initial thought was to find out where the figure got redrawn for printing or export and override the standard legend call with a call to my new function. However, as soon as the figure was printed or exported to an image file, internal Matlab workings would redraw the figure, including the legend, thereby undoing my careful legend crafting, squeezing it back into one column (Yuck!):Īs we wanted to automatically output images files, I had to delve into the hidden areas of Matlab to try to solve this problem. So where is the link with undocumented Matlab?Īs mentioned in the original columnlegend entry, it was relatively simple to redraw the legend as required on the screen. Multi-column legend Delving into the Undocumented Matlab ![]() Although lacking some features, columnlegend gave me a good start on developing what I wanted for a multi column legend, culminating in gridLegend: I wanted some way of generating a more compact legend format.įortunately earlier in the year, an entry on Matlab Central allowing a multi-column legend to be generated was posted, columnlegend. Using the standard Matlab legend function resulted in a long legend over twice the size of the associated plot: We often need to plot 40 or 50 lines of test data to visualize trends or outliers, using the legend to identify the number of test hours against each test specimen. However, there is only so much data consolidation possible before you start losing the information required. In my day job we have a requirement to condense a large quantity of data onto summary charts. This tale relates the development of a legend plotting routine, gridLegend, in an effort to improve the presentation. ![]() Whilst I enjoy using the many time saving features of Matlab, one area where I feel it suffers is the technical plotting and annotation. Adrian will describe a very handy utility that shows how basic built-in Matlab functions can be improved and customized by just a bit of fiddling under Matlab’s hood. Here we have discussed an introduction to Matlab Plot Legend with appropriate syntax and respective programming examples.I would like to welcome guest blogger Adrian Cherry. Labels become very important when we plot multiple functions in the same graph. We also learned to set the ‘direction’ and ‘Name’ of the label box as per our needs. We learned how to create labels in MATLAB plots and achieve desired styles. Legend (,'Location','northwest')Įxplanation: As we can notice in the output, our label box is now named. All we need to do is pass the pre-defined code for the direction, as an argument. ![]() Legend function in MATLAB allows us to put our label in place of our choice. Next, what if we don’t want our labels to be on the top right but in some other place on the plot. Here, we can name our functions as per our needs.Įxplanation: Notice on the top right side of the plot, we have got the names of our functions. In addition to the above code, we will add the below-mentioned line:Īs we can see, we have passed the name of the functions as an argument to our legend function. Our initial code will be the same as in the above example Now, what if instead of ‘data1’ and ‘data2’, we want to have the name of the function as the label. ![]() Since nothing was passed as an argument to legend function, MATLAB created labels as ‘data1’ and ‘data2’. This is how our input and output will look like in MATLAB console:Įxplanation: As we can see in the above output, we have plotted 2 vectors and our legend function created corresponding labels. Our inputs A, B& C are first passed as arguments to the function ‘plot’.Īnd then we simply write ‘legend’ in our code to get the labels. Now to understand how ‘Legend’ works, we will first plot our input functions and then use the function ‘legend’. ![]()
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