Dimensions and Variables
- To: mathgroup at smc.vnet.net
- Subject: [mg13687] Dimensions and Variables
- From: Naum Phleger <naum at condor.physics.ucsb.edu>
- Date: Sat, 15 Aug 1998 04:39:18 -0400
- Sender: owner-wri-mathgroup at wolfram.com
I have four questions.
1)Why does Dimensions comand return 2 for x*Cos[y]? I need to check
dimensions of quantities and this makes it dificult to do.
2)I have a complicated web of function definitions which I neglected to
put explisit variabe dependencies. Can I add dependence on the lowest
leval variables to the highest leval functions easily or do I have to
do it each step of the way. Any reference to a carefull and clear
discusion of variable dependent functions would also help.
3)Does Mathematica Know anything about map projections. I have a vector
feild of the sky and I want to plot it in a certin projection. All I
have been able to do so far is plot vectors on square euclidian space.
4)Sometimes when I plot these vector feilds I get an odd result. I get
no arow heads on some vectors, and multiple heads on others. I haven't
been able to figure out why it will do this or do it corectly. I seems
random to me.
Any help with any of these would be appreciated, Thank You
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