for example:
Cos[[Phi]1] -> c_1 , Sin[[Phi]1] -> s_1,Cos[[Phi]2] -> c_2 , Sin[[Phi]2] -> s_2
thus this can be simplified
with
{Cos[[Phi]i] -> c_i , Sin[[Phi]1] -> s_i}
Proxies-free.com: 100% Free Daily Proxy Lists Every Day!
Get Free Proxies Every Day
for example:
Cos[[Phi]1] -> c_1 , Sin[[Phi]1] -> s_1,Cos[[Phi]2] -> c_2 , Sin[[Phi]2] -> s_2
thus this can be simplified
with
{Cos[[Phi]i] -> c_i , Sin[[Phi]1] -> s_i}
I want to get the matrix as Figure 2. There should be two ways to achieve the result.
There is a matrix as Figure 1, and change it to the form of Figure 2.
Generating the matrix as Figure 2 directly.
How can I do it? Thanks.
Note：The matrix in Figure 2 is a symmetric matrix
Figure 1
Figure 2
Codes
{{C11,C12,C13,C14,C15,C16},{0,C22,C23,C24,C25,C26},{0,0,C33,C34,C35,C36},{0,0,0,C44,C45,C46},{0,0,0,0,C55,C56},{0,0,0,0,0,C66}}
My input is a product of the variable x
with index:
x[1]^2 x[5] x[7]
How do I extract the indices of the above product to get the list {1,1,5,7}
as an output? Note 1 appears twice in the list since x[1]
is squared.
I would like this code to work for any product of x[j]^n
, where both j and n will be given integers.
I have a polynomial in the following style,
polynomialdata= Subscript[xy, 1, 1][0]*Subscript[xy, 1, 2][0] + Subscript[xy, 1, 1][0]*Subscript[xy, 2, 1][0] + Subscript[xy, 1, 2][0]*Subscript[xy, 2, 2][0] + Subscript[xy, 2, 1][0]*Subscript[xy, 2, 2][0] + Subscript[xy, 1, 1][0]*Subscript[xy, 1, 2][0]*Subscript[xy, 2, 1][0]*Subscript[xy, 2, 2][0] + Subscript[xy, 2, 1][0]*Subscript[xy, 3, 1][0] + Subscript[xy, 1, 1][0]*Subscript[xy, 1, 2][0]*Subscript[xy, 2, 1][0]*Subscript[xy, 3, 1][0]
I wonder how to remove certain terms in the polynomialdata
such as Subscript[xy, 2, 1][0] Subscript[xy, 3, 1][0]
or keeping terms such as Subscript[xy, 1, 1][0]*Subscript[xy, 1, 2][0]*Subscript[xy, 2, 1][0]*Subscript[xy, 3, 1][0]
.
Probably one stupid way is to do the following
Keep[expr_] :=
expr /. {Subscript[xy, 1, 1][0]*Subscript[xy, 1, 2][0]-> 0, Subscript[xy, 1, 1][0]*Subscript[xy, 2, 1][0]-> 0, Subscript[xy, 1, 2][0]*Subscript[xy, 2, 2][0]-> 0, Subscript[xy, 2, 1][0]*Subscript[xy, 2, 2][0] -> 0, Subscript[xy, 2, 1][0]*Subscript[xy, 3, 1][0]-> 0}
Keep[data]
the result gives 0
; which is not I expected.
I want the outcome to be Subscript[xy, 1, 1][0]*Subscript[xy, 1, 2][0]*Subscript[xy, 2, 1][0]*Subscript[xy, 2, 2][0] + Subscript[xy, 1, 1][0]*Subscript[xy, 1, 2][0]*Subscript[xy, 2, 1][0]*Subscript[xy, 3, 1][0]
. Maybe I could use DeleteCases
function.
However, if the data has many terms, it will be very inefficient to do the above removing. Is there any way to solve it? Thank you very much in advance!
The keyboard shortcut ctrl+_
for subscript does not work on Mac OSX (Swiss keyboard layout). If I use German layout, I can make subscript but no fraction. I’ve tested on different machines. It always gives a fraction instead, for which the shortcut is ctrl+-
.
I need to write a statistical paper. So I need to use subscripts and superscripts, often with in the same alphabet. For example X^2 at time “t”, time “t-1” etc. I also need to type special symbols like beta, theta, alpha etc.
This is possible in Microsoft Word I am aware, but i often use a note taking app like notability to jot down my notes before transferring them into the final draft.
For apps like that you need to harcode the symbol and the keyboard shortcut in the “keyboards” in system preferences.
I am calling $y_{n}=x^{n}$ and I want to plot $ln(y_{n})$ for a number of different integer values of $n$ (I know this is very simple- it’s actually a much simpler version of what I’m actually trying to do). If I execute
Table(Plot(Log(x^n), {x, 0, 1},
AxesLabel -> {"x", "ln(" Subscript(y, n) ")"}), {n, 1, 3})
the final part of the $y$ axis label moves to the front. Is there any way to avoid this whilst also properly displaying the subscript. Thanks in advance for any help.
I keep receiving this error in some of my functions, how can I fix it?
“error: invalid types ‘float(float)’ for array subscript
99 | avg(i) = sum(static_cast(i)) / 5;
| ^”
void count (int s(), float avg(), int size)
{
float sum = 0.0;
for (int i = 0; i < size; i++)
{
//sum of test scores of students
cin >> s(i);
{
sum += s(i);
// calculate average
avg(i) = sum(static_cast(i)) / 5;
}
}
}
So you can copy paste even if you can’t see it – subscript “s” (Unicode Character “ₛ” (U+209B))
My main meta question Should I edit the squares in this title? Is it just me who’s seeing them? explains that when I view the site https://www.compart.com/en/unicode/U+209B
Question: I use unicode characters from compart.com and elsewhere frequently (greek letters, arrows, degrees symbol) and I’ve never had a problem, what is suddenly so challenging about this subscript s?
I see this in MacOS 10.11 and Chrome on a late 2012 MacBook Air
and this in MacOS 10.15 and Safari on a brand new 2020 MacBook Air
Does anyone know if Google Docs supports nested superscripts and subscripts like the following?
A^{x3rd}
C._{x2nd}
When I try the Format-> Text menu options, everything is formatted relative to the main line. If the same formatting is applied to text that already has this attribute, this option is disabled instead of allowing embedding in text.