Sign-up for free online course on ANSYS simulations!INTRODUCTORY MATLAB TUTORIAL
Step 5: Plot σx vs. ri, Take 3: File Input/Output
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Scroll down to look at the example under Remarks.
Consider the following statement:
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This will read in _\[A\]_ from the specified file. Let's test this at the command line before we add it to our program: |
Check A in the Workspace. Note that each line in the text file is interpreted as a matrix row.
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Append the elements of _\[B\]_ to _input_data.txt_ and save the file: |
Now we need to tell MATLAB to:
- Read in the first two rows and assign it to A.
- Read in the last two rows and assign it to B.
An additional complication is that A and B have different number of columns. To handle this mess, we turn to the following nugget from the dlmread documentation:
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\[ (2,0) \____________________\_ \] |
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\[_...\__\____________________\_ \] |
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\[(n-1,0) \_________\_ \_(n-1,m-1)\] |
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Once again, edit _beam4.m_. Now, use the dlmread command with the delimiter and range inputs to extract both A and B at the same time. The delimiter should be '', the range should be \[0 0 1 1\] for A and \[2 0 3 0\] for B. Remember to add your semi-colons. |
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