min/max filtering (array)

[tester]

One of previous topics created another one.

Within array, how to filter values within min/max range?

Let say that min=0, max=200
then from values: -1,2,40,100,400
only these in min/max range are on output.

I guess this can be done by filtering all above and below, or by pushing through all within minmax range.

I'm reading these ruby docs, but can't understand how to get it (I even have no idea whether I'm reading the right thing).

[billv]

You can try the nubeat7 class array thing....
http://www.dsprobotics.com/support/viewtopic.php?f=3&t=1760#p8243
It's got a min/max for array in there....

[tester]

I guess you mean this part

Code: Select all

   def limit (minVal,maxVal)
     return self.map{|item|[[item,minVal].max,maxVal].min}
   end


I'm not sure how to put it to work (ins/outs as usual]

[Nubeat7]

just put the module inside your schematic ( before any other ruby module)
and you can use it like

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output @yourarray.limit(minVal,maxVal)

if you dont want to use the methode expansion module you have to rewrite the methode from a class methode (the stuff with self) to a "normal" methode where self would be your array:

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def limit (minVal,maxVal)
     return self.map{|item|[[item,minVal].max,maxVal].min}
   end

would be

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output @yourArray.map{|item|[[item,minVal].max,maxVal].min}

to use it like the class methode without putting the expansion module inside the schematic you also could declare the methode in your ruby module like:

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class Array
def limit (minVal,maxVal)
     return self.map{|item|[[item,minVal].max,maxVal].min}
   end
end

and u can use it like this :

Code: Select all

output @yourarray.limit(minVal,maxVal)

too!

[Nubeat7]

but sorry i didnt read the first post well, just answered to billvs idea.. the above methode describes how to set all values inside an array to min /max values (limits the values!) to show just the values which are in a given range you need a different methode... but sorry too tired atm.. have to work tomorrow but search keep_if here:
http://ruby-doc.org/core-2.0.0/Array.html

[billv]

Got it tester....took longer than expected..
Gives exact same output as standard green min/max...
Float array input and output...

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def event i,v
  if i == 0 then
  data=[]
  x=0
  minVal = 0.5
  maxVal = 1
  a = maxVal - minVal
  @list.length.times do |x|   
  data[x] = @list.map{ |x| x.to_f * a + minVal }
     x += 1     
end
   output 0,data[0]
    watch  data
end
end

[billv]

This is a single float version...

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def event i,v
  if i == 0 then
    minVal = -0.5
    maxVal = 0.5
     a =  maxVal - minVal
     b =  @txt * a
     c =  b + minVal
               
    output 0,c
end
end

@nubeat7
Did have a lot of trouble using

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.map{|item|item*maxVal-minVal+minVal}

dosn't seem to happen with the "maxVal-minVal" where it is...
if you follow the flow of standard green min/max..
the "maxVal-minVal" dosn't belong inside main calculation...so it sort of makes sense

[Nubeat7]

@tester
this should do it:

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output @yourarray.keep_if{|x|x>minValue && x<maxValue}

@nubeat7
Did have a lot of trouble using
CODE: SELECT ALL
.map{|item|item*maxVal-minVal+minVal}

dosn't seem to happen with the "maxVal-minVal" where it is...
if you follow the flow of standard green min/max..
the "maxVal-minVal" dosn't belong inside main calculation...so it sort of makes sense

what you are trying to do here is scaling the values to min max range.. look inside my expansion module the methode calls "scale_values"

[Tronic]

just one line method

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# range method (n..n) === N

val_to_test_in_range = @in;
val_if_in_range = @in ;
val_if_not_in_range = 0.0 ;

min = 0.0 ;
max = 0.5 ;

is_val_in_range = (min..max) === val_to_test_in_range ? val_if_in_range : val_if_not_in_range ;

... with array

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array = [-1,0.0,90,50,100,150,200]

min = 0.0 ;
max = 100 ;

(array.map {|v| (min..max) === v ? v : nil }).compact

[billv]

what you are trying to do here is scaling the values to min max range.. look inside my expansion module the methode calls "scale_values"

I actually posted the limiter fix for tester from your fsm,
but for some reason i deleted it and changed it to scale..
While the limiter works fine...

Code: Select all

def event i,v
  if i == 0 then
    minVal = 0
    maxVal = 1
   a = @txt.map{|item|[[item,minVal].max,maxVal].min}
   output 0,a
  end
end

I still can't get a result from this...

Code: Select all

def event i,v
  if i == 0 then
    minVal = 0.5
    maxVal = 1
   a = @txt.map{|item|item*maxVal-minVal+minVal}
   output 0,a
  end
end