### Author:  [@netphysicist](https://discourse.processing.org/u/netphysicist)
#### Post date: [December 10, 2018, 2:27pm UTC](https://discourse.processing.org/t/use-into-setup-a-float-value-from-a-method-that-finds-it/6343/21 "2018-12-10T14:27:00Z")
If you run this code, what is your result??
How many peaks are in the end in the console??
---
### Author:  [@kll](https://discourse.processing.org/u/kll)
#### Post date: [December 10, 2018, 2:30pm UTC](https://discourse.processing.org/t/use-into-setup-a-float-value-from-a-method-that-finds-it/6343/22 "2018-12-10T14:30:36Z")
pls study above picture, you see the graph and the result.
at 1.23 i see and get result 5 peaks
---
### Author:  [@netphysicist](https://discourse.processing.org/u/netphysicist)
#### Post date: [December 10, 2018, 2:37pm UTC](https://discourse.processing.org/t/use-into-setup-a-float-value-from-a-method-that-finds-it/6343/23 "2018-12-10T14:37:12Z")
> [@kll](#):
>
> void findTHRESHOLD() { float sum\_Intensity=0; float intensity,maxIntensity=0,average\_intens; int trow = table.getRowCount(); for (int i=0; i\ maxIntensity ) maxIntensity = intensity; sum\_Intensity += intensity; } average\_intens= (sum\_Intensity/(trow-1)); THRESH=(average\_intens + maxIntensity/2); println("findTHRESHOLD\_average\_intens “+average\_intens+” maxIntensity “+maxIntensity+” THRESH: "+THRESH); }
if you replace line 107 with:
> THRESH=((average\_intens + maxIntensity)/2);
will your result be 7 peaks at the end???
---
### Author:  [@kll](https://discourse.processing.org/u/kll)
#### Post date: [December 10, 2018, 2:40pm UTC](https://discourse.processing.org/t/use-into-setup-a-float-value-from-a-method-that-finds-it/6343/24 "2018-12-10T14:40:09Z")
NO
sorry also still 5
---
### Author:  [@netphysicist](https://discourse.processing.org/u/netphysicist)
#### Post date: [December 10, 2018, 3:11pm UTC](https://discourse.processing.org/t/use-into-setup-a-float-value-from-a-method-that-finds-it/6343/25 "2018-12-10T15:11:58Z")
please load the data below:
> **data**
>
> Time,Intensity
> 10,0.2
> 20,0.4
> 30,0.4
> 40,0.3
> 50,0.6
> 60,0.6
> 70,0.9
> 80,0.7
> 90,0.5
> 100,0.5
> 110,0.3
> 120,0.1
> 130,0.3
> 140,0.5
> 150,0.6
> 160,0.4
> 170,0.3
> 180,0.1
> 190,0.1
> 200,0.2
> 210,0.2
> 220,0.3
> 230,0.1
> 240,0.2
> 250,0.5
> 260,0.6
> 270,0.6
> 280,0.7
> 290,1.2
> 300,1.3
> 310,1.1
> 320,0.9
> 330,0.6
> 340,0.6
> 350,0.5
> 360,0.3
> 370,0.3
> 380,0.1
> 390,0.1
> 400,0.2
> 410,0.4
> 420,0.4
> 430,0.6
> 440,0.6
> 450,0.7
> 460,0.7
> 470,0.7
> 480,0.9
> 490,1
> 500,0.8
> 510,0.5
> 520,0.5
> 530,0.2
> 540,0.2
> 550,0.2
> 560,0.1
> 570,0.1
> 580,0.1
> 590,0.2
> 600,0.2
> 610,0.2
> 620,0.6
> 630,0.6
> 640,0.5
> 650,0.5
> 660,0.5
> 670,0.8
> 680,0.8
> 690,0.9
> 700,0.9
> 710,0.9
> 720,0.9
> 730,1.2
> 740,1.6
> 750,1.3
> 760,1.1
> 770,0.8
> 780,0.8
> 790,0.8
> 800,0.5
> 810,0.3
> 820,0.3
> 830,0.1
> 840,0.1
> 850,0.2
> 860,0.2
> 870,0.2
> 880,0.5
> 890,0.5
> 900,0.7
> 910,0.8
> 920,0.8
> 930,0.9
> 940,0.9
> 950,0.9
> 960,1.2
> 970,1.4
> 980,1.1
> 990,1
> 1000,0.8
> 1010,0.8
> 1020,0.7
> 1030,0.5
> 1040,0.5
> 1050,0.2
> 1060,0.2
> 1070,0.1
> 1080,0.1
> 1090,0.3
> 1100,0.5
> 1110,0.6
> 1120,0.9
> 1130,1.2
> 1140,1.8
> 1150,1.6
> 1160,1.5
> 1170,1.2
> 1180,1.1
> 1190,0.9
> 1200,0.9
> 1210,0.7
> 1220,0.5
> 1230,0.3
> 1240,0.1
> 1250,0.3
> 1260,0.5
> 1270,0.6
> 1280,0.4
> 1290,0.3
> 1300,0.1
> 1310,0.1
> 1320,0.2
> 1330,0.2
> 1340,0.3
> 1350,0.1
> 1360,0.2
> 1370,0.5
> 1380,0.6
> 1390,0.6
> 1400,0.7
> 1410,1.2
> 1420,1.3
> 1430,1.1
> 1440,0.9
> 1450,0.6
> 1460,0.6
> 1470,0.4
> 1480,0.6
> 1490,0.6
> 1500,0.5
> 1510,0.5
> 1520,0.3
> 1530,0.2
> 1540,0.2
> 1550,0.3
> 1560,0.5
> 1570,0.5
> 1580,0.2
> 1590,0.2
> 1600,0.2
> 1610,0.1
> 1620,0.1
> 1630,0.1
> 1640,0.2
> 1650,0.2
> 1660,0.2
> 1670,0.6
> 1680,0.6
> 1690,0.7
> 1700,1.2
> 1710,1.3
> 1720,1.1
> 1730,0.9
> 1740,0.6
> 1750,0.6
> 1760,0.5
> 1770,0.3
> 1780,0.3
> 1790,0.1
> 1800,0.1
> 1810,0.2
> 1820,0.1
> 1830,0.1
> 1840,0.2
> 1850,0.2
> 1860,0.2
> 1870,0.5
> 1880,0.5
> 1890,0.7
> 1900,0.8
> 1910,0.9
> 1920,1.2
> 1930,1.4
> 1940,1.1
> 1950,1
> 1960,0.7
> 1970,0.7
> 1980,0.3
---
### Author:  [@netphysicist](https://discourse.processing.org/u/netphysicist)
#### Post date: [December 10, 2018, 3:14pm UTC](https://discourse.processing.org/t/use-into-setup-a-float-value-from-a-method-that-finds-it/6343/26 "2018-12-10T15:14:19Z")
Also could you please explain me the line:
> if ( intensity \> maxIntensity ) maxIntensity = intensity;
and how do you find max values???
---
### Author:  [@kll](https://discourse.processing.org/u/kll)
#### Post date: [December 10, 2018, 3:22pm UTC](https://discourse.processing.org/t/use-into-setup-a-float-value-from-a-method-that-finds-it/6343/27 "2018-12-10T15:22:50Z")
you have the code,
i set max to 0
and in loop i remember it if a bigger value comes,
that is a very usual **find max** way
so you give us wrong data for the CSV
anyhow can you pls. use the CODE
```auto
```
thing for code and your long data lists
---
### Author:  [@netphysicist](https://discourse.processing.org/u/netphysicist)
#### Post date: [December 10, 2018, 3:43pm UTC](https://discourse.processing.org/t/use-into-setup-a-float-value-from-a-method-that-finds-it/6343/28 "2018-12-10T15:43:35Z")
I am sorry for the wrong data…
Thank you for your time and for your help…
One more question, there isn’t a function to find max value ?
As long as we declare the line
```auto
if ( intensity > maxIntensity ) maxIntensity = intensity;
```
and the maxIntensity is a float variable, are enough to find the max value of 200 values in a table???
---
### Author:  [@kll](https://discourse.processing.org/u/kll)
#### Post date: [December 10, 2018, 3:51pm UTC](https://discourse.processing.org/t/use-into-setup-a-float-value-from-a-method-that-finds-it/6343/29 "2018-12-10T15:51:47Z")
well, instead this line
what is inside your loop over all intensity values
can use the math max()
[https://processing.org/reference/max\_.html](https://processing.org/reference/max_.html)
but outside? you think of a table.max() ?
i don’t know, its possible,
your trick reverse sort get(0) worked also
but fired back as long you did it on the original table.
---
### Author:  [@netphysicist](https://discourse.processing.org/u/netphysicist)
#### Post date: [December 10, 2018, 4:05pm UTC](https://discourse.processing.org/t/use-into-setup-a-float-value-from-a-method-that-finds-it/6343/30 "2018-12-10T16:05:18Z")
I was just thinking about a table.max() but it’s ok if your way is right…
I am a new one in processing and i try to understand…
Is your way accepted???
---
### Author:  [@kll](https://discourse.processing.org/u/kll)
#### Post date: [December 10, 2018, 4:08pm UTC](https://discourse.processing.org/t/use-into-setup-a-float-value-from-a-method-that-finds-it/6343/31 "2018-12-10T16:08:16Z")
> [@netphysicist](#):
>
> Is your way accepted???
use max() if it makes you happy
---
### Author:  [@netphysicist](https://discourse.processing.org/u/netphysicist)
#### Post date: [December 10, 2018, 4:10pm UTC](https://discourse.processing.org/t/use-into-setup-a-float-value-from-a-method-that-finds-it/6343/32 "2018-12-10T16:10:25Z")
Thank you so much…!!! I am sorry if i upset or tire you 🤔😊😉
---
### Author:  [@kfrajer](https://discourse.processing.org/u/kfrajer)
#### Post date: [December 11, 2018, 6:27am UTC](https://discourse.processing.org/t/use-into-setup-a-float-value-from-a-method-that-finds-it/6343/33 "2018-12-11T06:27:41Z")
@netphysicist I see you are implementing a peak finding algorithm. Can you elaborate how your picking the peaks in your data? Are you using `THRESH=((average_intens + maxIntensity)/2);` to select the peaks of interest?
If you are going to apply this algorithm to other data sets, there could be a better strategies to get those peaks. However, if this does the job, then you can disregard this message.
Kf
---
### Author:  [@netphysicist](https://discourse.processing.org/u/netphysicist)
#### Post date: [December 11, 2018, 8:55am UTC](https://discourse.processing.org/t/use-into-setup-a-float-value-from-a-method-that-finds-it/6343/35 "2018-12-11T08:55:03Z")
```auto
import java.util.Map;
final int ROWZERO=0;
final int COL_TIME=0;
final int COL_INTENSITY=1;
float THRESH;
Table table;
ArrayList timePeakPair;
void setup() {
table=loadTable("data2.csv", "header");
timePeakPair=new ArrayList();
table.setColumnType("Time", Table.INT);
table.setColumnType("Intensity", Table.FLOAT);
boolean aboveThresh=false;
int ctr=0;
float sum_xfx=0;
float sum_x=0;
int rowBeginSection=-1;
findTHRESHOLD();
for (int i=0; i=THRESH) { //Above or equal
aboveThresh=true;
sum_xfx+=time*intensity;
sum_x+=time; //Store the first time entry
ctr+=1;
if (rowBeginSection<0) rowBeginSection=i;
//println(ctr,sum_x,sum_xfx);
} else {
//If finish a section above threshold, calculate peak follow by reseting fields
if (aboveThresh==true) {
//Calculating...
float intPeak=sum_xfx/sum_x;
float timePeak=getTimeEntry(rowBeginSection, intPeak, ctr); //sum_x/ctr;
PVector pt = new PVector(timePeak, intPeak);
timePeakPair.add(pt);
//println("CALC: ", ctr, timePeak, intPeak);
//Reseting...
sum_xfx=0;
sum_x=0;
ctr=0;
rowBeginSection=-1;
aboveThresh=false;
}
}
}
//REPORT:
println("Number of peaks = "+timePeakPair.size());
}
float getTimeEntry(int rowStart, float peakValue, int ctr) {
//Trivial case
if (ctr==1)
return table.getInt(rowStart, COL_TIME);
float ctime=-1;
for (int i=rowStart; ipeakValue) {
int idx=i-1;
ctime=table.getInt(idx, COL_TIME);
break;
}
}
return ctime;
}
void findTHRESHOLD(){
float sum_Intensity=0;
float Num = 0;
for (int i=0; i
### Author:  [@kll](https://discourse.processing.org/u/kll)
#### Post date: [December 11, 2018, 9:31am UTC](https://discourse.processing.org/t/use-into-setup-a-float-value-from-a-method-that-finds-it/6343/36 "2018-12-11T09:31:42Z")
! warning
this is again the same code from the beginning what never worked
with the temp fix from @jb4x
it runs,
with the drawing utility i provided later possibly you see clearer what
data OP try to analyze ( after a bad trick in findTHRESHOLD() )
the fixed findTHRESHOLD() i provided already
> [@kfrajer](#):
>
> there could be a better strategies to get those peaks
still your input is welcome!
---
### Author:  [@netphysicist](https://discourse.processing.org/u/netphysicist)
#### Post date: [December 11, 2018, 9:34am UTC](https://discourse.processing.org/t/use-into-setup-a-float-value-from-a-method-that-finds-it/6343/37 "2018-12-11T09:34:40Z")
Yeah this is right, yours:
```auto
//import java.util.Map;
//final int ROWZERO=0;
//final int COL_TIME=0;
//final int COL_INTENSITY=1;
float THRESH;
Table table;
ArrayList timePeakPair;
boolean dprint = true;
void setup() {
size(400, 500);
table=loadTable("data2.csv", "header");
timePeakPair=new ArrayList();
table.setColumnType("Time", Table.INT);
table.setColumnType("Intensity", Table.FLOAT);
boolean aboveThresh=false;
int ctr=0;
float sum_xfx=0;
float time, intensity, sum_x=0;
int rowBeginSection=-1;
findTHRESHOLD();
for (int i=0; i=THRESH) { //Above or equal
aboveThresh=true;
sum_xfx+=time*intensity;
sum_x+=time; //Store the first time entry
ctr+=1;
if (rowBeginSection<0) rowBeginSection=i;
//println(ctr,sum_x,sum_xfx);
} else {
//If finish a section above threshold, calculate peak follow by reseting fields
if (aboveThresh==true) {
//Calculating...
float intPeak=sum_xfx/sum_x;
float timePeak=getTimeEntry(rowBeginSection, intPeak, ctr); //sum_x/ctr;
PVector pt = new PVector(timePeak, intPeak);
timePeakPair.add(pt);
//println("CALC: ", ctr, timePeak, intPeak);
//Reseting...
sum_xfx=0;
sum_x=0;
ctr=0;
rowBeginSection=-1;
aboveThresh=false;
}
}
}
//REPORT:
println("Number of peaks = "+timePeakPair.size());
}
float getTimeEntry(int rowStart, float peakValue, int ctr) {
//Trivial case
if (ctr==1)
return table.getInt(rowStart, "Time");
float ctime=-1;
for (int i=rowStart; ipeakValue) {
int idx=i-1;
ctime=table.getInt(idx, "Time");
break;
}
}
return ctime;
}
void findTHRESHOLD() {
float sum_Intensity=0;
float intensity, maxIntensity=0, average_intens;
int trow = table.getRowCount();
for (int i=0; i maxIntensity ) maxIntensity = intensity;
sum_Intensity += intensity;
}
average_intens= (sum_Intensity/(trow-1));
// THRESH=(average_intens + maxIntensity/2);
THRESH=((average_intens + maxIntensity)/1.9);
println("findTHRESHOLD_average_intens "+average_intens+" maxIntensity "+maxIntensity+" THRESH: "+THRESH);
}
void draw() {
background(200,200,0);
draw_graph();
}
void draw_graph() {
float intensity, x0= 20, y0 = 450, w= 2, zoom = 200;
for (int i=0; i
### Author:  [@kll](https://discourse.processing.org/u/kll)
#### Post date: [December 11, 2018, 9:52am UTC](https://discourse.processing.org/t/use-into-setup-a-float-value-from-a-method-that-finds-it/6343/38 "2018-12-11T09:52:30Z")
more or less, that was the version using the too short dataset
and a intermediate test of your change:
```auto
// THRESH=(average_intens + maxIntensity/2);
THRESH=((average_intens + maxIntensity)/1.9);
```
@netphysicist
now a look at your SORTED data from CSV file
( the picture above )
not only might help to understand the sort problem i try to tell you about
it is also very interesting about a other point:
your measuring signal ( called Intensity ) and unit [mV]
shows these steps
( you know from your CSV already )
you have data from 0 … 1.8 come with one decimal only
that is a resolution of 18 steps
if the problem is not in
- the initial signal amplifying
- the cheapest AD converter ever
- a wrong calculation from AD value to float
it must be in the data transport ( sending one decimal only )
so i just recommend sending raw data
like from arduino INT 0 … 1023
or do a ranging to 0 … 100.0x %
what again to be LOSSLESS would have be to send with 2 decimals
does this all tell you anything?
---
### Author:  [@netphysicist](https://discourse.processing.org/u/netphysicist)
#### Post date: [December 11, 2018, 10:51am UTC](https://discourse.processing.org/t/use-into-setup-a-float-value-from-a-method-that-finds-it/6343/39 "2018-12-11T10:51:06Z")
No, i did not understand anything…I download my data from Internet so there aren’t converted or filtered or anything else…
---
### Author:  [@kll](https://discourse.processing.org/u/kll)
#### Post date: [December 11, 2018, 10:53am UTC](https://discourse.processing.org/t/use-into-setup-a-float-value-from-a-method-that-finds-it/6343/40 "2018-12-11T10:53:15Z")
pls. LINK,
where you got the data ?csv?
and where come the code from?
---
### Author:  [@netphysicist](https://discourse.processing.org/u/netphysicist)
#### Post date: [December 11, 2018, 11:50am UTC](https://discourse.processing.org/t/use-into-setup-a-float-value-from-a-method-that-finds-it/6343/41 "2018-12-11T11:50:07Z")
I don’t remember from where i have downloaded the data maybe in physionet but the code i tried to develop it on my own with your and forum’s help…
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