How to use colon notation to address arrays
Автор: Jeff Anderson Math
Загружено: 2020-11-13
Просмотров: 904
Описание:
We learn how to address many elements in a matrix using colon notation.
00:00 -Introduction
00:40 -Start in excel to define matrix
00:56 -Fill out row one and column one using series fill in
01:22 -Enter formula to create row 2 of multiplication table
02:45 -Enter formula to create row 3 of multiplication table
03:23 -Error auto filling row 4 without a hard reference
04:19 -Save Multiplication Table as a .csv file
04:50 -Use MATLAB’s readmatrix function to import data
05:56 -Search the readmatrix help documentation
06:51 -Address an individual element
07:28 -Syntax to refer to entire columns using colon notation
08:11 -Example 1: Refer to column 3 using colon notation
08:33 -Example 2: Refer to column 10 using colon notation
09:35 -Syntax to refer to a subset of entries in a column using colon operator
10:02 -Example 3: Look at rows 3 – 5 in column 2 using colon operator
10:41 -Example 4: Produce rows 3 – 5 in column 2 using vector notation
10:56 -Example 5: Get rows out of order using vector notation
11:25 -Example 6: The connection between colon and vector notation
12:20 -Syntax: grab specific rows across all columns using colon operator
12:45 -Example 7: Take all entries in rows 2 and 3 of a matrix
13:18 -Example 8: Grab rows of a matrix with even row index
14:25 -Example 9: Refer to individual columns
14:51 -Visualize syntax to grab columns using colon notation
15:44 -Syntax to refer to entire rows using colon notation
16:28 -Example 10: Display row 10 using colon notation
17:08 -Example 11: Get a subset of entries in a row using colon operator
17:37 -Example 12: Get a subset of entries in a row using vector notation
18:46 -Example 13: Take all entries in columns 4 and 5 of a matrix
19:25 -Example 14: Use colon notation to pick a submatrices
20:15 -Example 15: Colon operators work with column vectors too
21:40 -Example 16: Be careful using colons with row vectors
22:24 -Example 17: Use colon notation to grab special entries
23:51 -Community challenge: Why is colon notation helpful?
24:43 -Conclusion
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