Francois Normandin

Hi PJM, The key is in the item symbol number. They start at 1000 and there are 141 of them. Select the active cell to change which column you're working on.

QUOTE(Aristos Queue @ Feb 6 2008, 11:15 PM) Well, that's very instructive. When you put it this way, it makes sense! Flexibility at the cost of performance...

1- I noticed the same thing with Dynamic Dispatch... 2- I added a "byReference" comparison to jfazekas's VIs and I end up with a ten-fold decrease in speed... :headbang: Is it to be expected or I completely missed the point of byReference architecture? I would have thought it to be quite comparable. Anyone has a benchmark on that? Download File:post-10515-1202338932.zip

That's a very basic question. Are you sure you tried to look for it before posting? A simple Google search would yield the answer right away... http://digital.ni.com/public.nsf/allkb/E3E...EA?OpenDocument

QUOTE(Dirk J. @ Jan 30 2008, 04:42 AM) Good idea Dirk... it could be as simple as a RLC type circuit equivalent. More info on the system that produces this step response would be required.

QUOTE(jbrohan @ Jan 29 2008, 03:06 PM) If you have an 8th-degree polynomial fit, why not do a 2nd derivative on the algebraic solution? It all depends on how good is the fit compared to original signal, but algebraic solution wouldn't have bumps... y = ax^8 + bx^7 + cx^6 + dx^5 + ex^4 + fx^3 + gx^2 + hx + i dy/dx = 8ax^7 + 7bx^6 + 6cx^5 + 5dx^4 + 4ex^3 + 3fx^2 + 2gx + h d(dy)/dx^2 = 56ax^6 + 42bx^5 + 30cx^4 + 20dx^3 + 12ex^2 + 6fx + 2g Use an algorithm to find the zeroes of your second derivative (inflection points), then keep only those values whose first derivatives are positive. (i.e. where the slope stops increasing and starts decreading). After finding "x", the slope can be found by solving dy/dx for this value... Hope this helps!

QUOTE(Gabi1 @ Jan 25 2008, 04:24 PM) To create a strict type reference of a waveform chart, right-click on waveform chart and create a reference. Then, in the block diagram, right-click on the reference you just created and create a constant. This newly created reference will be "strict" type.

Is that what you're trying to achieve?