Got it! thanks
--- In [email protected], "Markus Witzler" <funny...@...> wrote: > > Hello Steve, > > let add what Mike answered to my question on static variables a short while > ago (see below). > > Cheers > > Markus > > - - - - - - - - - - > > The difference is the lifespan of the value. Formalizing your sample, we have > the following code: > > ... > b = 5; > ... > b = 6; > > When running over a watchlist, the script is restarted for each symbol. Using > your example, once the script begins over again for the next symbol, the > value of b just before the line b = 5 will be the same as it was for the > first symbol. Specifically, b will be undefined, not 6 as was the case at the > end of the previous symbol's execution. > > In other words, variables do not retain their value between executions of the > script. > > The behavior of VarSet is identical to simply saying b = 5. The only > difference is that you can dynamically construct the name of the variable as > opposed to hard coding it. This is useful when setting variables in a loop > (e.g. b1 = ..., b2 = ..., b3 = ...). > > Static variables are primarily used for two reasons: > > 1. To preserve values from execution to execution. > For example, changing your original code to use statics (StaticVarSet) would > mean that for all subsequent symbols, the value of b would be 6 just before > the line StaticVarSet(b, 5) instead of undefined. For the first symbol, b > would still initially have been undefined until set to 5. > > For a more practical example; automation traders will re-run the same > scan/exploration over and over throughout the day as new bars come in. Using > static variables they are able to preserve state information between > executions (e.g. whether or not a position has been taken), even if running > on just a single symbol rather than a watchlist. > > 2. To access information across panes. > StaticVarGet can be used from other panes to access a static value set from a > different pane. Rather than having everything displayed in a single pane in a > single script, it is sometimes more practical to do the calculations once in > a "master" pane, and have one or more additional "detail" panes/scripts that > chart a variety of related information. > > Additional usage might include access within the latter pass of the > backtester to values set during the initial signal generating pass. > > Mike > > --- In [email protected], "Markus Witzler" <funnybiz@> wrote: > > > > Hello, > > > > could someone enlighten me as to when I "should" use static variables > > (Varset)? > > > > I understand that they serve as "temporary storage space". > > > > But couldn´t I just use any letter, such as b=5 and later assign b = 6 etc. > > and retrieve/change its value whenever needed > > > > Where is the difference to a static variable? > > > > Sorry - again - for my ignorance! > > > > Thanks > > > > Markus > > > > ----- Original Message ----- > From: Steve Dugas > To: [email protected] > Sent: Saturday, January 30, 2010 4:00 PM > Subject: Re: [amibroker] What are static variables used for? > > > > Hi -I think the big thing with static vars is that they can be shared, i.e. > you can create a var in one chart and save it with StaticVarSet(), then you > can access it from other charts or from AA with a call to StaticVarGet(). > > Steve > > ----- Original Message ----- > From: "Pmxgs" <pm...@...> > To: <[email protected]> > Sent: Saturday, January 30, 2010 9:45 AM > Subject: [amibroker] What are static variables used for? > > > Hello, > > > > can someone please explain me what ate static variables used for? > > > > In the help section it says that a static varable keeps its value in > > memory until the end of the program. > > What's the difference between this and assigning a value to a normal > > variable (which also doesn't change unless we assign another value to > it). > > For example: var=3; keeps this variable equal to 3 until we assign > another > > value to it. > > > > I know I'm missing something obvious, but I'm learning how to program and > > I can't understand this concept. > > > > thanks > > > > > > > > > > > > ------------------------------------ > > > > **** IMPORTANT PLEASE READ **** > > This group is for the discussion between users only. > > This is *NOT* technical support channel. > > > > TO GET TECHNICAL SUPPORT send an e-mail directly to > > SUPPORT {at} amibroker.com > > > > TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at > > http://www.amibroker.com/feedback/ > > (submissions sent via other channels won't be considered) > > > > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG: > > http://www.amibroker.com/devlog/ > > > > Yahoo! Groups Links > > > > > > > > > > > > > > __________ Information from ESET Smart Security, version of virus signature > database 4668 (20091207) __________ > > The message was checked by ESET Smart Security. > > http://www.eset.com > > > > > __________ Information from ESET Smart Security, version of virus signature > database 4668 (20091207) __________ > > The message was checked by ESET Smart Security. > > http://www.eset.com >
