 # What does ExE conformable mean?

I see "ExE" conformable throughout the GAUSS manual. What does it mean?

0

ExE stands for "element by element". It means that all operations are scalar operations. For example, the most obvious case is with a scalar and a vector or matrix like this:

```a = 2;
b = { 1.3,
5.2 };
c = a .* b;
```

which assigns c to be equal to:

```c =  2.6
10.4
```

This same

```a = { 0.5,
0.75 };
b = { 4,
2 };
c = a .* b;
```

performs ExE multipliction and assigns the following vector to c:

```c = 2
1.5
```

The same principle also applies to some GAUSS intrinsic functions, for example cdfBeta.

```p1 = cdfBeta(0.5, 2, 3);
p2 = cdfBeta(0.5, 2, 4);
```

will assign a and b as follows:

```p1 = 0.6875
p2 = 0.8125
```

However, we also have the option of passing in a vector for the final output like this:

```b = { 3,
4 };
p = cdfBeta(0.5, 2, b);
```

which will assign p to:

```p = 0.6875
0.8125
``` aptech

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