## being equal two matrics contaning NaNs and numbers smaller than 1

on 2 Oct 2012

### Azzi Abdelmalek (view profile)

` Hi all,`

I have two matrics e.g. "a" & "b", which contains some "NaN" elements and numbers less than 1.

`   a=[NaN 0.4539 0.4532; NaN 0.4536 NaN]; b=[NaN 0.4533 0.4538; NaN 0.4531 NaN];`

I want to see if "a" and "b" are equal with NaNs values ? the desired decimal places is 3.

` How can I write such program?`

## Products

No products are associated with this question.

### Azzi Abdelmalek (view profile)

on 2 Oct 2012
Edited by Azzi Abdelmalek

### Azzi Abdelmalek (view profile)

on 2 Oct 2012
``` a=round(a*1000)/1000;
b=round(b*1000)/1000;
a(isnan(a))=0;
b(isnan(b))=0;
test=all(all((a==b)))```

% if test =1 then a=b

Azzi Abdelmalek

### Azzi Abdelmalek (view profile)

on 2 Oct 2012

Your are right Matt. I had in mind to revise it after work, I was telling myself that a(isnan(a))=0; was suspicious.

the corrected code

```a=[NaN 0.4539 0.4532; NaN 0.4536 NaN];
b=[NaN 0.4539 0.4532; 0 0.4536 NaN];
test1=all(all(isnan(a)==isnan(b)))
a=round(a*1000)/1000;
b=round(b*1000)/1000;
isnan(a)
a(isnan(a))=0;
b(isnan(b))=0;
test2=all(all((a==b)))
test=test1 & test2
```

I am sur there is a better way to do it

Azzi Abdelmalek

### Azzi Abdelmalek (view profile)

on 2 Oct 2012

the answer isequalwithequalnans(a,b) was suggested and deleted.

Teja Muppirala

### Teja Muppirala (view profile)

on 3 Oct 2012

Recent versions now have the ISEQUALN function, which is exactly the same thing as ISEQUALWITHEQUALNANS except the name is much easier to type.

MATLAB and Simulink resources for Arduino, LEGO, and Raspberry Pi