# Would such a node exist? Max/Ave/Min
**URL:** https://discourse.nodered.org/t/would-such-a-node-exist-max-ave-min/51840
**Category:** General
**Created:** [4 October 2021 14:43 UTC](https://discourse.nodered.org/t/would-such-a-node-exist-max-ave-min/51840 "2021-10-04T14:43:14Z")
**Posts on this page:** 12
**Page:** 1
### Author:  [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)
#### Post date: [4 October 2021 14:43 UTC](https://discourse.nodered.org/t/would-such-a-node-exist-max-ave-min/51840/1 "2021-10-04T14:43:14Z")
It wouldn't be _rocket science_, but I don't want to reinvent the wheel if I can avoid it.
You are receiving a series of messages (values).
The node "splits" the values to 3 outputs:
Maximum value received.
Average value received.
Minimum value received.
(If a _reset_ message is received all stored values are wiped)
Would such a node exist?
## Update:
The `calculate` node NEARLY does this.
`node-red-contrib-calculate`
But lacks the ability to be reset by a message.
And yes, I would need 3 nodes to do what I want, but that doesn't mean I couldn't use it.
---
### Author:  [@rko](https://discourse.nodered.org/u/rko)
#### Post date: [4 October 2021 14:59 UTC](https://discourse.nodered.org/t/would-such-a-node-exist-max-ave-min/51840/2 "2021-10-04T14:59:27Z")
Have you had a look at [`moving-average`](https://flows.nodered.org/node/node-red-contrib-moving-average)?
---
### Author:  [@ghayne](https://discourse.nodered.org/u/ghayne)
#### Post date: [4 October 2021 14:59 UTC](https://discourse.nodered.org/t/would-such-a-node-exist-max-ave-min/51840/3 "2021-10-04T14:59:48Z")
Smooth node? (built in).
---
### Author:  [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)
#### Post date: [4 October 2021 15:03 UTC](https://discourse.nodered.org/t/would-such-a-node-exist-max-ave-min/51840/4 "2021-10-04T15:03:34Z")
Looking good - was looking at the other one but yours slipped in just in time.
But..... How do I make the ` over the most recent` ongoing until a `msg.reset` is received?
It is 02:03 local here. Brain is really not in gear.
---
### Author:  [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)
#### Post date: [4 October 2021 15:04 UTC](https://discourse.nodered.org/t/would-such-a-node-exist-max-ave-min/51840/5 "2021-10-04T15:04:24Z")
Thanks.
I'll look at it. Just I saw the reply with `smooth` and it is _built in_ which is kind of handy.
Just got that question about _ongoing_ number of messages.
Yeah, ok. Sorry. Same problem as `smooth`.
The _number of messages_ is unknown and only determined by `msg.reset`.
So: not quite there.
---
### Author:  [@Colin](https://discourse.nodered.org/u/Colin)
#### Post date: [4 October 2021 15:09 UTC](https://discourse.nodered.org/t/would-such-a-node-exist-max-ave-min/51840/6 "2021-10-04T15:09:41Z")
What happens if you put a very large number as the number to average/max/min over? I suspect it may do what you want.
---
### Author:  [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)
#### Post date: [4 October 2021 15:12 UTC](https://discourse.nodered.org/t/would-such-a-node-exist-max-ave-min/51840/7 "2021-10-04T15:12:16Z")
Y-e-a-h....
Ok.
That is an option.
(Thanks.)
I just ..... wasn't sure that was.... _coacher_ in doing it that way. (_Legal_ - if you will)
It isn't like I am talking squillions of messages.
24 \* 60 \* ...... 2 -ish.
90,000 I think is there about.
---
### Author:  [@Colin](https://discourse.nodered.org/u/Colin)
#### Post date: [4 October 2021 15:26 UTC](https://discourse.nodered.org/t/would-such-a-node-exist-max-ave-min/51840/8 "2021-10-04T15:26:14Z")
> [@Trying\_to\_learn](#):
>
> just ..... wasn't sure that was.... _coacher_ in doing it that way.
Submit a PR on the docs for the node to clarify the action when less than the configured count have been received. Then it will be legal.
---
### Author:  [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)
#### Post date: [4 October 2021 20:14 UTC](https://discourse.nodered.org/t/would-such-a-node-exist-max-ave-min/51840/9 "2021-10-04T20:14:34Z")
Just got up a while ago.
While _sleeping_ between those posts and now I thought:
(I'm asking for a sanity check on this option)
As I am wanting Max, Min and AVG (as opposed to Mean and all the other things offered by those nodes.
How about this code in a `function` node:
```auto
var MAX = context.get("MAX") || 0;
var COUNTER = context.get("COUNTER") || 0;
var MIN = context.get("MIN") || null;
var AVG = context.get("AVG") || null;
var TOTAL = context.get("TOTAL") || null;
var NEW = msg.payload;
msg1 = {};
msg2 = {};
if (msg.reset == true)
{
// Reset all things
node.warn("RESET");
context.set("MAX",0);
context.set("COUNTER",0);
context.set("MIN",null);
context.set("AVG",null);
context.set("TOTAL",null);
return;
}
if (COUNTER == 0)
{
// First pass
MIN = msg.payload;
}
NEW = msg.payload;
if (MAX > NEW)
{
MAX = NEW;
context.set("MAX",NEW);
}
if (MIN < NEW)
{
MIN = NEW;
context.set("MIN",NEW);
}
COUNTER = COUNTER + 1;
context.set("COUNTER",COUNTER);
TOTAL = TOTAL + NEW;
context.set("TOTAL",TOTAL);
AVG = parseInt((TOTAL / COUNTER));
msg.payload = "My calculated average is " + AVG;
msg1.payload = MAX;
msg2.payload = MIN;
return [msg,msg1,msg2];
```
No offence on the offers.
But the _overhead_ of the 3 nodes to do a _simple_ thing over a 24 hour time....
Their _stacks_ (?) would/could get quite big because they offer so much more that I don't need.
This way it gets rid of a lot of that kind of stuff.
Just wanting to check.
---
### Author:  [@rko](https://discourse.nodered.org/u/rko)
#### Post date: [4 October 2021 20:59 UTC](https://discourse.nodered.org/t/would-such-a-node-exist-max-ave-min/51840/10 "2021-10-04T20:59:09Z")
I think the two if conditions are not correct. Shouldn't it be `MAX < NEW` and `MIN > NEW`? Or easier to read, `NEW > MAX` and `NEW < MIN`.
You could also just do something like
```auto
context.set("MAX", Math.max(...[NEW, MAX]));
context.set("MIN", Math.min(...[NEW, MIN]));
// etc.
```
IMHO, I would rather use an existing node, even if it's not perfect, than reinventing the wheel. But it really depends on your goals.
---
### Author:  [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)
#### Post date: [4 October 2021 21:06 UTC](https://discourse.nodered.org/t/would-such-a-node-exist-max-ave-min/51840/11 "2021-10-04T21:06:39Z")
No problems. It just A_hit me_ while I was sleeping.
Ok, what I'm doing:
At start up, there are no values. Given.
```auto
if (COUNTER == 0)
{
// First pass
MIN = msg.payload;
MAX = msg.payload;
}
```
That sets the MAX and MIN to the first message's value.
Though I think this is the part - yes?
```auto
if (MAX > NEW)
{
MAX = NEW;
context.set("MAX",NEW);
}
if (MIN < NEW)
{
MIN = NEW;
context.set("MIN",NEW);
}
```
You are correct.
`if (NEW > MAX)`
and
`if (NEW < MIN)`
Thanks!
I didn't know of that command. `Math.max` and `Math.min`.
But...
Anyway, it was just a thought. Just having three nodes which are way more _powerful_ than what is needed, etc... Seems overkill. (And memory use)
---
### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [3 December 2021 22:54 UTC](https://discourse.nodered.org/t/would-such-a-node-exist-max-ave-min/51840/13 "2021-12-03T22:54:37Z")
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