Re: 100 rows and 100 columns random matrix
- To: mathgroup at smc.vnet.net
- Subject: [mg123485] Re: 100 rows and 100 columns random matrix
- From: "Karamiarokhloo, M.P. (Mehdipasha)" <M.P.Karamiarokhloo at uu.nl>
- Date: Thu, 8 Dec 2011 05:28:27 -0500 (EST)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
- References: <201112071115.GAA04259@smc.vnet.net>
Hi,
one way to do this is to re-define all the values smaller than 0.5 (<=0.5) as for example 0 and the values
larger than 0.5 (>0.5) as 1.Then you use the count function.
Here is an example:
In[40]:= data = {0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9} /.
x_ /; x <= 0.5 -> 0
Out[40]= {0, 0, 0, 0, 0, 0.6, 0.7, 0.8, 0.9}
In[41]:= Count[data, 0]
Out[41]= 5
I hope this will help.
P.Karami
________________________________________
From: Sahar Nazemi [nazemisahar at yahoo.com]
Sent: Wednesday, December 07, 2011 12:15 PM
To: mathgroup at smc.vnet.net
Subject: [mg123485] 100 rows and 100 columns random matrix
Hello
I'm a student of geology who works with
Mathematica sofware .I'm learning it by myself recently.
I have a question and will appreciate if you
help me in this regard.
I have created a 100 rows and 100 columns random
matrix which its elements are between 0 to 1(for example it consists of
0.687,...).
Now I want to know how many of these elements
are in the range of "0 to 0.5" and how many are in the range of
"0.5 to 1".
I also use "Count" function as below
but it doesnt answer:
Count[a,{0,0.5}]
("a" is my random matrix).
Regards
Sahar Nazemi
- References:
- 100 rows and 100 columns random matrix
- From: Sahar Nazemi <nazemisahar@yahoo.com>
- 100 rows and 100 columns random matrix