MatrixForm affects values instead of only printing ?????
- To: mathgroup at smc.vnet.net
- Subject: [mg100298] MatrixForm affects values instead of only printing ?????
- From: summer <summertan at hotmail.com>
- Date: Sun, 31 May 2009 06:35:42 -0400 (EDT)
Here is the example:
test1={-3, 7, 5}
test1[[3]]
returns the list and 5 as expected;
test2={-3, 7, 5}//MatrixForm
test2[[3]]
returns a column vector and error: "part 3 of blah blah doesn't exist". The actual list itself is test2[[1]]. To get the right 3rd element I have to do:
test2[[1,3]]
which returns 5 as expected.
The problem is MatrixForm is NOT supposed to change the expression it is applied on according to the manual. Is that a bug or there's logical explanation?