Learning LabVIEW (IV) - MATLAB script node

    It is well known that LabVIEW can realize mixed programming of G language and MATLAB language through MATLAB script nodes in the program. Everyone likes it because it is not very convenient to drag and drop the operation nodes provided by LabVIEW in the block diagram for some complex formulas.
    After the MATLAB script node is inserted into the program block diagram, there will be a text editing area where you can write code, as shown in the figure below: This node actually corresponds to a MATLAB Automation Server, and the Command Window of the Server will also appear after running the program.  If a program module wants to play a role, it must have input and output ports. We can configure it through the right-click menu of the MATLAB script node, as shown in the figure below: After adding the port, you need to specify the name, which is used as a variable name in the MATLAB script, as shown in the figure below But this still cannot connect to the data flow of other nodes in LabVIEW. I am not sure how to classify graphical languages, but LabVIEW gives me the feeling of Static Type Language. If you want to connect the MATLAB script node to the data flow of the LabVIEW block diagram smoothly, you need to specify the type of input/output port. Right-click on the port and select the type, as shown in the figure below:  As an exercise, a program is written to calculate the n+1th element based on the nth element of the Look and Say sequence. What is a Look and Say sequence? The answer can be found at https://en.wikipedia.org/wiki/Look-and-say_sequence . The algorithm used in the code can be found in "Quickly Use the sort-diff-find Combination Technique" . The program flowchart is as follows: The program interface is as follows: It is worth noting that after adding an array control to the interface, a numerical control must be placed in the array control to indicate that this array is a numerical array. So the LabVIEW G language has a feeling of Static Type.  Take a look at the running effect: Since the MATLAB code in the MATLAB script node is executed in MATLAB's Automation Server, we can view the values ​​of each variable in the Command Window of the Server: