Run While 1 Loop Again Matlab

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This article is meant to help new users create a office file using nested loops that will create a multiplication tabular array of whatsoever size. There are many different ways to brand one, only this method is easier for beginners of MATLAB. These steps require no previous feel with MATLAB.

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1. ane

   Open up MATLAB. Start the MATLAB software, and check that the software is functioning correctly. If the software is ready to be used, information technology volition brandish a "Ready" message in the lesser left-manus corner of the screen (highlighted in blood-red).

   • If the message displays "busy", so MATLAB is still running a function from a previous case. To safely stop any MATLAB role, press Ctrl+C at the aforementioned fourth dimension. This will abolish any currently running calculations, allowing MATLAB to be used once again.

2. two

   Clear information. If there are any variables in the Workspace, type articulate and press ↵ Enter . This will clear any past information from the Workspace, the toolbox on the left of the screen. If the Workspace is empty, you may skip this step.

   • This command only clears variable data, so any past files that you saved volition remain stored in MATLAB.

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3. iii

   Create a new function file. To create a new function file, select "Function" nether the "New" tab in the summit left hand corner. Function files are user-created lines of code that perform specific actions. Function files allow users to run multiple complex calculations with a single line of code.

4. iv

   Name your function file. Supervene upon the text Untitled with a name for your function file that you lot can choose. You lot can choose whatsoever name that is not already in use past MATLAB, but there are some restrictions.

   • The name must start with a letter of the alphabet
   • No strange or special characters
   • Underscores must be used in identify of spaces

5. 5

   Prepare the function file for use. Delete the green text to clear upwardly space for your code. The spacing between the header line and the terminate does non matter.

6. 6

   Assign input arguments. Delete the input_args and in the brackets put a variable n . Variables in Matlab are messages or words that correspond a numeric value and are used to simplify calculations. This variable volition be the dimensions of the multiplication table. When the office file is run, the user will input a value for the variable to exist used in the function file.

   • Function files can take more than than one input, or they can have none at all.

7. 7

   Assign output argument. Delete the output_args and in the parentheses put a variable named Table . This variable will be the completed multiplication table that will be displayed at the terminate of the function file.

8. eight

   Create an empty table. On the next line, type the aforementioned variable as the output variable from the previous step and set it equal to zeros(n); . This will create an northward x n table of zeros that volition serve as a template when the part is executed.

   • The semi-colon prevents MATLAB from displaying every calculation from this line, which would clutter the screen with irrelevant data.

9. 9

   Create the outer "for" loop. The get-go line of the "for" loop will exist for Column = 1:1:n . This outer loop will serve as cavalcade header for the multiplication tabular array.

   • The "for" tells MATLAB that this is a for loop and will exist highlighted in blue. "Column" is the variable that will tell MATLAB how many times it volition run and the value the variable will have when it is run. In this example, the for loop will run from "1" to "n", with the middle "1" calculation 1 to the variable each time. With normal "for" loops, y'all would have to write a code that would tell the loop what to exercise each time information technology runs beneath the "for" line. However, with certain nested loops such as this one, the code that will run will only be in the inner loop.

10. x

    Create the inner "for" loop. This line will exist for Row = ane:1:n , which is the same as the previous footstep only for the rows of the table.

11. 11

    Multiply the columns and rows together. Underneath the previous footstep, type Entry = Row*Column; .

    • This will multiply each row with each column to produce the entries of the multiplication table. Alignment of the lines volition not mess upwards the code, but MATLAB volition automatically format the lines in a loop together anyways. Over again the semi-colon is used to prevent MATLAB from displaying every single calculation, as only the completed table is important.

12. 12

    Fill in the empty table with the multiplied values. For the final line of the inner "for" loop, type Tabular array(Column, Row) = Entry; .

    • This will take each value multiplied by the row and column, and replace the zeros from the empty table in step 8. "(Column, Row)" acts every bit a coordinate point for the multiplication table which tells MATLAB where the location of the value is.

13. 13

    Complete the two "for" loops. Every loop needs an "end" statement when the code is finished. To complete the nested loop or function file, add together an end under the previous step. So printing ↵ Enter and add another cease on a divide line. There should be nothing else on the a line that has an "stop" argument.

    • There should exist a third end statement at the very stop that was automatically added past MATLAB to complete the office. The corporeality of infinite betwixt a loop and its "end" statement does not affair.
    • As a full general rule, there should be an "end" argument somewhere underneath for every blue highlighted word.
    • To check if there are enough "end" statements, click on a blue highlighted word. Information technology will highlight the other blue word that is continued to it.

14. xiv

    Check to see if MATLAB has detected any errors. Check the correct bar of the function file to see if MATLAB has found any errors in your code. The color of the box will indicate whether there are any bug with the lawmaking. If there are any bug, MATLAB will place a colored line side by side to where the error is.

    • Green - In that location are no problems with the lawmaking. You may continue to the adjacent step.
    • Orange/Yellowish - Missing a semi-colon. This means the role will nonetheless piece of work, but it will be slower and prove unnecessary information.
    • Red - There is a serious problem that will preclude the office from running. Hovering the mouse over a blood-red line under the box will tell yous what kind of mistake is constitute on that line. Clicking on Details volition requite you lot an caption and suggest possible ways of fixing the error.

15. 15

    Name and save your function file. To relieve your function file, press the Save equally choice under the "Save" tab. When naming a office file, always utilize the aforementioned name every bit the proper noun y'all chose for your function file, to avoid any defoliation.

    • By default, MATLAB files are saved to C:\Users\[User Name]\Documents\MATLAB.

16. 16

    Exam your function. To test your function file, run it past typing the name of the role file and add input arguments in parentheses. To make a 6x6 multiplication table for example, type MultiplicationTable(6) into the command window at the bottom of the screen, replacing "MultiplicationTable" with the name that yous saved the function file under. Y'all have now completed a function file to produce a multiplication table.

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• MATLAB volition reload your work from the last session if yous accidentally shut the program.

• All MATLAB code is run from the acme line to the bottom.

• The command window may non be large plenty to display the entire tabular array in one frame, and will carve up the tabular array into parts.

• Actress white space volition not change the code or how MATLAB runs.

• While loops tin can besides exist used to do the same role, but requires more knowledge of MATLAB.

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• When changing the value of a variable to a number or another variable, e'er put the variable that will be changed on the left side of the equals sign, and the value it volition change to on the right side.

• Ever consummate a loop or function file by typing end.

• If the box on the sidebar of a part file is ruby, it means at that place is a problem that is preventing the lawmaking from running properly.

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