Tagged Questions
0
votes
1answer
59 views
Fitting a model in R, Least squares estimates
$ \Bbb E$(grades) =
$\bigg(\alpha$, teacher='Female',
and,
$\bigg( \alpha+\beta $, teacher='Male'
given that I have loaded up the required data, how should I go about fitting this model in R? Then ...
0
votes
0answers
18 views
two or more negative cases for solving integer programming with Gröbner basis
Below are maple code, i have tried several cases for two more negatives, still failed.
how to treat two or more negative coefficient in order to solve with Gröbner basis
Two negative cases
...
1
vote
2answers
404 views
Gr. 11 Functions - Limiting domain and range on a graphing calculator
I'm trying to do a homework assignment on my graphing calculator app for my ipad (Quick graph+).
(Edit by Willie: The images are originally posted here http://imgur.com/a/XRj4g I've included them ...
0
votes
2answers
148 views
Intersection of the graphs of two functions
Let $$f(x)={x^3-14x^2+7x+203\over(x-3)(8-x)}$$ I want to find the two solutions of $$f(x)f''(x)=(f'(x))^2,\qquad3\le x\le8$$
This is the first time i am using maple, and i cannot get the graph to ...
-1
votes
1answer
98 views
What is this unary matrix operation called?
I have the folowing problem! $B \cdot \overline{X} = C$ where $B$ is $(12 \times 12)$ matrix and $C$ is $(12 \times 4)$. $X$ is unknown. What does $\overline X$ mean?
Also I need to solve this in ...
0
votes
1answer
202 views
Formula writing tool
Does someone know any online tool that can allow me to write down mathematical expresions
such as this one:
I have lots of this formulas and little exercices, i would like to write down, to be ...
0
votes
1answer
680 views
In this Cholesky Algorithm in matlab, what is the abs function doing
We have been told in our homework to implement the following program:
function A = Cholesky(A)
% Cholesky Decomposition of a Matrix A, so that the resulting matrix L gives A=L*L
N = size(A,1);
...
2
votes
1answer
5k views
Implement a program in Matlab for LU decomposition with pivoting
I need to write a program to solve matrix equations Ax=b where A is an nxn matrix, and b is a vector with n entries using LU decomposition. Unfortunately I'm not allowed to use any prewritten codes in ...
