The ease of use, the ability to make models that are very specific for my needs. I like the fact that MATLAB can be used from the command line, and through an IDE/GUI as well. I dislike the fact that it can sometimes take a while to load, and when you have a large model that has been created over time, it can be difficult to figure out what is going wrong. I also do not enjoy using MATLAB. Sometimes it takes a long time to get things done because there are so many functions to choose from. It can be rather frustrating at times. If you need to create mathematical modeling or simulations, this is the best software available.
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