# I am having an Issue
**URL:** https://discourse.processing.org/t/i-am-having-an-issue/2367
**Category:** Coding Questions
**Created:** [August 4, 2018, 5:28pm UTC](https://discourse.processing.org/t/i-am-having-an-issue/2367 "2018-08-04T17:28:25Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@magic\_moose](https://discourse.processing.org/u/magic_moose)
#### Post date: [August 4, 2018, 5:28pm UTC](https://discourse.processing.org/t/i-am-having-an-issue/2367/1 "2018-08-04T17:28:25Z")
I am trying to make a bar graph for the following data however my “i” integer is not being recognized.
String[] name = {
“1997:”,
“1998:”,
“1999:”,
“2000:”,
“2001:”,
“2002:”,
“2003:”,
“2004:”,
“2005:”,
“2006:”,
“2007:”,
“2008:”,
“2009:”,
“2010:”,
“2011:”,
“2012:”,
“2013:”,
“2014:”,
“2015:”,
“2016:”,
};
int[] fires = {
6,835 ,
5,227 ,
7,562 ,
5,177 ,
6,223 ,
5,759 ,
5,961 ,
5,574 ,
4,908 ,
4,805 ,
3,610 ,
3,593 ,
2,858 ,
2,434 ,
3,056 ,
2,922 ,
3,672 ,
2,920 ,
3,231 ,
2,816 ,
};
void setup(){
size(500,500);
}
void draw(){
int x =0;
for(int i=0; i\<10; i++){
```
if(mouseX>x && mouseX<=x+40){
fill(255, 96, 79);
}else{
fill(255, 36, 13);
}
```
}
float h = map(fires[i], 2300, 7600, 36, 340);
rect(x+4, height-h, 32, h);
x+=8;
}
I am very new to processing and need some help.
---
### Author:  [@neilcsmith](https://discourse.processing.org/u/neilcsmith)
#### Post date: [August 4, 2018, 5:45pm UTC](https://discourse.processing.org/t/i-am-having-an-issue/2367/2 "2018-08-04T17:45:27Z")
The brace that ends the for loop seems to be in the wrong place. It should probably be after the x += 8 line?
---
### Author:  [@magic\_moose](https://discourse.processing.org/u/magic_moose)
#### Post date: [August 4, 2018, 5:48pm UTC](https://discourse.processing.org/t/i-am-having-an-issue/2367/3 "2018-08-04T17:48:24Z")
I changed that however when I run it now I get an error “ArrayIndexOutOfBoundsException: 40” with my float h line being highlighted
---
### Author:  [@behreajj](https://discourse.processing.org/u/behreajj)
#### Post date: [August 4, 2018, 6:44pm UTC](https://discourse.processing.org/t/i-am-having-an-issue/2367/4 "2018-08-04T18:44:05Z")
Hi magic\_moose,
You can use `name.length` and `fires.length` to find the number of entries you have in each of your arrays. This will help when using a for-loop to run through them. By my count, `name` has 20 entries while `fires` has 40. I’m assuming that there’s a connection between the two, like every 2 entries in `fires` is to be matched with every 1 entry in `name`?
```auto
void setup() {
size(500, 500);
println("name's length", name.length);
println("fires's length", fires.length);
int minsz = min(fires.length, name.length);
int relsz = max(fires.length, name.length) / minsz;
println(relsz);
for (int i = 0, j = 0; i < minsz; ++i, j += relsz) {
println(name[i], fires[j], ",", fires[j + 1]);
}
}
```
You can work with more than one variable in your for-loop to keep your arrays in sync. In this case, my variable `i` is matched with the `name` array, while `j` is matched with the `fires` array. Because `fires` is twice as big, `j` must be incremented twice as fast as `i`. This is why I used `j += relsz` (relative size or length, 2) in the third section of the for-loop. `i` and `j` only exist within the for-loop, and disappear from memory after it finishes. `minsz` and `relsz` will disappear after `setup` finishes.
A sample of what this sketch will print in the console:
```auto
1997: 6 , 835
1998: 5 , 227
1999: 7 , 562
2000: 5 , 177
```
I recommend watching Dan Shiffman’s videos, particularly this one on variable scope. Depending on where a variable like `float h` is located relative to your curly braces, `{` and `}`, Processing may not know that it exists or what information it contains.
[ ](https://www.youtube.com/watch?v=pC7RUmHL2KY)
Hope that helps out!
---
### Author:  [@magic\_moose](https://discourse.processing.org/u/magic_moose)
#### Post date: [August 4, 2018, 7:08pm UTC](https://discourse.processing.org/t/i-am-having-an-issue/2367/5 "2018-08-04T19:08:28Z")
Thank you for the help however where it comes with 40 outputs it was meant to be 20. the commas in the numbers were just to show a number placement ex: 1,000 = 1000.
Sorry for the confusion, I am just very very lost
---
### Author:  [@behreajj](https://discourse.processing.org/u/behreajj)
#### Post date: [August 4, 2018, 7:32pm UTC](https://discourse.processing.org/t/i-am-having-an-issue/2367/6 "2018-08-04T19:32:54Z")
Hi magic\_moose,
It’s very helpful that you pointed that out. Those commas are confusing Processing, too, because it uses commas to separate entries in an array, not for grouping within a number. So, although this isn’t solving your big problem yet, you can now get rid of a small problem which is making the bigger one harder to solve.
```auto
int[] fires = {
6835, 5227, 7562, 5177, 6223,
5759, 5961, 5574, 4908, 4805,
3610, 3593, 2858, 2434, 3056,
2922, 3672, 2920, 3231, 2816
};
int sz = fires.length;
for(int i = 0; i < sz; ++i) {
println(i + 1, nfc(fires[i]));
}
```
If in the future I ever want to display the values in `fires` with commas to make them easier to read I can use [nfc](https://processing.org/reference/nfc_.html). (How I treat my information when I’m working in code is a separate design issue from how I format and display it to other people.)
Figuring out how to draw rectangles on the screen with a for-loop might be another sub-problem which will get you closer to your big goal. Again, Shiffman’s [videos](https://www.youtube.com/watch?v=h4ApLHe8tbk) are helpful, in my opinion.
Best,