LabVIEW
Duplicating odd marker labeling on axis
Hi Don,
As far as I know you can't automatically setup the scale to fit the values that you want. This is simply because you can't calculate the logarithm of a negative number. However, the scale you want is actually a completely simple linear scale that goes from 1 to -1 but it's presented as the 20*log(|y|) where y is the value of the y axis (1 to -1). Since only the representation is changed, you can just remove the numbers from the scale and insert the "0", "-6", etc. strings instead. It will then look something like this:
Let me know if you have problems reproducing this customization.
Have fun!
As far as I know you can't automatically setup the scale to fit the values that you want. This is simply because you can't calculate the logarithm of a negative number. However, the scale you want is actually a completely simple linear scale that goes from 1 to -1 but it's presented as the 20*log(|y|) where y is the value of the y axis (1 to -1). Since only the representation is changed, you can just remove the numbers from the scale and insert the "0", "-6", etc. strings instead. It will then look something like this:
Let me know if you have problems reproducing this customization.
Have fun!
Message Edited by Philip C. on 11-10-2005 02:37 AM
Hi Don,
All I did was choose the Y-scale style that doesn't have marker values and then
simply put free text labels at the appropriate places on the Graph. Don't use
String Indicators/controls unless you need to programmatically change the
strings while the IV is running. I then selected all the labels and the Graph
and grouped it all together, so they wouldn't move independently if dragged at
edit time.
Very simple indeed!
Hi Don,
Good question about the ∞-sign. Well, I used the same procedure as I always use when using "weird" characters; open Microsoft Word, select "Insert » Symbol..." and then find your symbol among the many choices. The ∞-sign can be found used in many fonts under the Mathematical Operators category:
Notice that the symbol is unicode that we don't officially support, so you can't use it in owned labels, enums etc. Also, notice that if you use the value of the ∞-symbol as a string value, you will get in trouble when passing it to a string indicator (what did I just say; unicode is not officially supported in LabVIEW - I warned you, right?):
Well, I guess you can get some acceptable results if you don't pass the value to the indicators. And just a note; you CAN indeed get the reference to a free label and thereby control its properties - but it requires the use of VI Server which means a lot of additional programming for you. However, there are example programs out there that shows this feature if you are interested.
Have fun!
Good question about the ∞-sign. Well, I used the same procedure as I always use when using "weird" characters; open Microsoft Word, select "Insert » Symbol..." and then find your symbol among the many choices. The ∞-sign can be found used in many fonts under the Mathematical Operators category:
Notice that the symbol is unicode that we don't officially support, so you can't use it in owned labels, enums etc. Also, notice that if you use the value of the ∞-symbol as a string value, you will get in trouble when passing it to a string indicator (what did I just say; unicode is not officially supported in LabVIEW - I warned you, right?):
Well, I guess you can get some acceptable results if you don't pass the value to the indicators. And just a note; you CAN indeed get the reference to a free label and thereby control its properties - but it requires the use of VI Server which means a lot of additional programming for you. However, there are example programs out there that shows this feature if you are interested.
Have fun!
Message Edited by Philip C. on 11-15-2005 07:43 PM
