Feeds
질문
Computing mean by group (need help with speed!)
Hi everyone, I need to demean the columns of matrix Xw (200000 x 24) by group id. To do this, I need to compute means of the ...
10년 초과 전 | 답변 수: 6 | 1
6
답변질문
How does particle swarm deal with objective function evaluations to NaN?
Hi everyone, Simple question, though I haven't been able to find a definite answer: How does the Particle Swarm optimization ro...
10년 초과 전 | 답변 수: 1 | 0
1
답변질문
Help speeding up matrix algebra in loop...
Hi everyone, I'm simply looking for some suggestions for speeding up the following block of code: bhat = (X'*X)\(X'*y);...
10년 초과 전 | 답변 수: 1 | 0
1
답변질문
warning when solving nonlinear equations with 'solve'
Hi everyone, Quick question: I'm trying to solve a nonlinear system of 30 equations in 30 unknowns using the solve function, an...
11년 초과 전 | 답변 수: 1 | 0
1
답변질문
Creating symbolic function with certain properties but unspecified functional form?
I've written code to symbolically log-linearize a non-linear model, and would like to specify several symbolic functions general...
대략 12년 전 | 답변 수: 1 | 0
1
답변질문
New user, help please!!!
I keep getting this error using the mupad solver!! equations:={eqn1,eqn2,...,eqn51} unknowns:={var1,var2,...,var51} sol...
12년 초과 전 | 답변 수: 1 | 0
1
답변질문
"Illegal variable context [DOM_VAR]" using mupad solver
I'm trying to symbolically solve a system of 51 equations in 51 unknowns. My code looks as follows: equations:={eqn1,eqn2,......
12년 초과 전 | 답변 수: 0 | 0
0
답변질문
simple fsolve problem...
I'm new to MATLAB and I'm trying to solve a nonlinear system of two (large) equations in two unknowns, but I keep getting the "T...
13년 초과 전 | 답변 수: 1 | 0
1
답변질문
One-dimensional array of variable length
I need to create a one-dimensional string array of _variable length_ that I can add elements to as needed. I don't know how lon...
14년 초과 전 | 답변 수: 3 | 0
3
답변질문
Converting string matrix from Excel to Matlab
I have an excel document containing a matrix of strings (that is, each cell contains a word of varying length). If possible, I ...
14년 초과 전 | 답변 수: 2 | 0
