Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>Actually, I think I have a rough answer to this.</p> <p>The answer is in the mex functions compiled from C that were called inside the Parfor. Those functions are not very well written, with many global pointers. I think with Parfor and having 8 workers, having to divide the memory, something messed up the mex files. It doesn't happen as often with For, but I found out that sometimes it does.</p> <p>The reason why the code was all hung up is because there was a line that says: if something is NaN, then pause. Pause should not be in a parfor because the multiple workers won't know what to do with it. Hence I thought the parfor loop was acting like an infinite loop.</p> <p>Note below: demand_full is a mex file and when I change the 'pause' to 'print circ' it's all NaN when the error happens. </p> <pre><code>for j = 1:NDRAWS pmat_temp = 1:mkt; parfor i = 1:mkt tauvec = [zeros(1, numD(i)) ones(1, numR(i))]; [circ] = demand_full(prices{i}, tauvec, rhoarray(i, j), theta); y = log(mean_mat2D_c(circ(tauvec==1))) - log(mean_mat2D_c(circ(tauvec==0))); pR = exp(rho_param1 + rho_param2 * rhoarray(i, j))... / (1 + exp(rho_param1 + rho_param2 * rhoarray(i, j))); lambda = exp(n_param1 + n_param2 * log(hhld(i)) + n_param3 * rhoarray(i, j) + n_param4 * rhoarray(i, j)^2); pN = lambda^(length(tauvec)) / exp(lambda) / factorial_c(length(tauvec)); p_market_config_temp = nchoosek_c(length(tauvec), numR(i)) * pR^numR(i) * (1 - pR)^numD(i); p_market_config = pN * (p_market_config_temp / (1 - pR^length(tauvec) - (1 - pR)^length(tauvec))); pmat_temp(i) = p_market_config * 1/sigma_q / sqrt(1/numR(i) + 1/numD(i)) * ... exp(-((yhat(i) - y) / sqrt(1/numR(i) + 1/numD(i)))^2 / 2 / sigma_q^2); if isnan(pmat_temp(i)) pause end end pmat(:, j) = pmat_temp; end </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POParfor in Matlab will not terminate in different occasions but For does
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USLinh
    1. USLinh
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POParfor in Matlab will not terminate in different occasions but For does
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload