For instance, in the previous section we plotted values of x and xnew as a line, but perhaps we are interested in highlighting values of xnew that are between 400-800 and also greater than 800. The more advanced programming features in Matlab also include the ability to use conditional statements to perform simple tests on variables. Title('for loop results') % Add title to plotĪs you can see, the for loop in the script above goes through each value in x from the first to the last ( length(x)) and adds each value to the previous and stores that value in the vector xnew.įor loops can be used for all sorts of batch computing and can greatly decrease the time you spend calculating values manually. Xold = xnew(i) % Set xold value to current xnew value
#Matlab tutorial plus
Xnew(i) = x(i)+xold % Set current xnew value to ith value in x plus sum of previous x values X = linspace(0,80,25) % Create variable x from 0 to 80 with 25 valuesįor i = 1:length(x) % Loop through the total number of entries in the vector x % script to create a new vector from an old vector using a for loop To do this, you could write a simple m-file with a for loop in it, as shown below. Say, for instance that you had a vector x that you wanted to use to create a new vector ( xnew) where each value within the xnew vector is equal to the sum of all the values above its location in the x vector. Loops provide a means for modifying individual values within a vector or matrix quickly and efficiently.
#Matlab tutorial series
In addition to being able to create script m-files in Matlab to run a series of commands, you can also use more advanced programming practices. I wouldn't be suprised if you need to look back to the previous Matlab exercises every now and then to remind yourself how some of the basics work. In this lab we will learn about loops, conditional statements and loops within loops (a.k.a. This lab builds on the skills you learned in the first Matlab lab last week.
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