Let’s get started.īefore we jump into MATLAB Programming, let’s take a look at the structure of the if statement.
Matlab if statement how to#
Or, at least not common enough that I can remember doing it.Conditional Statements in Matlab- In this tutorial, we will introduce you to the conditional statements if, if-else, and else if and then I will show you through examples, how to implement each of these statements in MATLAB. If it really is this piecewise function business then what is it that you're doing? I can't help you with better suggestions because I don't know your intent, but I can tell you this form isn't common. If you could give a concrete example then maybe I or someone else here could give a better workflow to restructure things so you don't wind up doing this. I've been using Matlab professionally for nearly a decade and I can't think of an instance where I've needed to do something like this. Why isn't equals in the middle? LT, EQ, GT makes the most sense to me and would be how I'd order it, if it were me, and that's the real trouble I think you're going to get into this as far as readability goes - it's up to the person debugging this to recreate the if statement by piecing together everything.īut again, back to the SO response - you probably shouldn't be doing this at all.
![matlab if statement matlab if statement](https://httpsak-a.akamaihd.net/62009828001/62009828001_5428228221001_3877304429001-vs.jpg)
It looks like a kind of a ternary statement, so readability-wise it's not so terrible, but I'll point out that you're calculating all of the options and then picking one result, so it's less computationally efficient, but the bigger worry that I have is that your calculations are separate from the conditions that select the results, so it's easy to screw up which condition goes to which entry in the results vector.Ĭase in point: you have less than, greater than, then equals. Stack overflow kind of a response here, but what is the actual use case that you've got that has resulted in you needing to do a bunch of one-line functions on a bunch of conditionals? I don’t think this works in MATLAB though because it wants to convert anything in a control flow statement to a logical. Its also worth noting that in some other languages, you can do this kind of thing really nicely by taking advantage of & short-circuiting like: When given a choice between doing something in a way that needs to be explained by comments and one that doesn’t, always choose the latter unless you have a really good reason to do otherwise. Also, if you decide you want another if statement above the first one, you’d have to add it and then change the previous first one to be the concatenation version. The “ifs = [ifs,”s feel more clunky than the normal if statements to me.
Matlab if statement code#
Your code might do that, but since nonzeros is vectorized and MATLAB pretty aggressively multithreads vectorized operations, you might have a statement evaluate out of order. If/elseif blocks are designed to stop after they reach the first true condition. If you forget to remove it’s corresponding evaluation, your code will happily go on evaluating the wrong thing without giving you any warning or error.
![matlab if statement matlab if statement](https://i.ytimg.com/vi/ESJAsWsCegM/maxresdefault.jpg)
Let’s say you want to remove one of the statements later. Splitting the conditionals from the statements they are evaluating can become a maintainability issue down the road. Even if it does work in the version you have, you don’t want your code to only work in specific versions of MATLAB. I am getting an error that error() is being called with too many output arguments. At least in the mobile version of MATLAB, which is all I have on me right now. Would using this method, with proper comments, be considered acceptable code, or would it just be too unusual for people to know how to read? % Using if statementsĮrror('Function requires 3 or 4 input arguments')
![matlab if statement matlab if statement](https://cdn.cupdf.com/img/1200x630/reader020/image/20190821/56649d485503460f94a23b02.png)
I came up with an alternative that works with most circumstances, and I was wondering if people think the following is acceptable code. I find if-statements with one line of code in each condition annoyingly long for the task they perform.