topic Re: Meaning of a= b*(c<=i<=d) +1 in SAS Programming

Meaning of a= b*(c<=i<=d) +1

SanjuKumari — Wed, 05 Jun 2019 15:23:19 GMT

I want to evaluate an expression in SAS . Can some one help me understand the meaning of this expression and write a short algo for this expression:

a= b*(c<=i<=d) +1

Re: Meaning of a= b*(c<=i<=d) +1

Reeza — Wed, 05 Jun 2019 15:36:38 GMT

Use the Order of Operations rule of basic mathematics and break it apart.

BEDMAS

*B = Brackets;
p1 = c<=i<=d;
*Exponents -none;
*Division and multiplication in the order they appear;
p2 = b*p1;
*Addition and subtraction in the order they appear;
p3 = p2 + 1;

*original formula;
A = b*(c<=i<=d) + 1;

*check the difference;
diff = p3 - A;

What do you mean by "write a short algo for this expression"?

@SanjuKumari wrote:

I want to evaluate an expression in SAS . Can some one help me understand the meaning of this expression and write a short algo for this expression:

a= b*(c<=i<=d) +1

Re: Meaning of a= b*(c<=i<=d) +1

Kurt_Bremser — Wed, 05 Jun 2019 15:42:42 GMT

You don't need to build an algorithm for this, this formula can be used as is in SAS.

Re: Meaning of a= b*(c<=i<=d) +1

ErikLund_Jensen — Wed, 05 Jun 2019 16:15:09 GMT

Hi @SanjuKumari

It means that the value of variable b is multiplied with the value of the logical expression in the parentheses, and then 1 is added to the result.

The logical expression c<=i<=d returns 1, if the value of variable i is within the interval c-d, or otherwise 0. So when variable b is multiplied with the the logical expression, the result is either b or 0.

Then you add 1 to the result, which means that variable a is assigned the value b+1 or 1 depending on whether variable i is within the interval c-d or not.

Re: Meaning of a= b*(c<=i<=d) +1

SanjuKumari — Wed, 05 Jun 2019 16:15:16 GMT

i want to know what b will get multiplied with ?
the value of P1 as per u .

Re: Meaning of a= b*(c<=i<=d) +1

SanjuKumari — Wed, 05 Jun 2019 16:15:58 GMT

As i have to do this code migration, i need to understand it

Re: Meaning of a= b*(c<=i<=d) +1

SanjuKumari — Wed, 05 Jun 2019 16:16:32 GMT

i want to know what b will get multiplied with ?
the value of P1 as per u .

Re: Meaning of a= b*(c<=i<=d) +1

Reeza — Wed, 05 Jun 2019 16:19:08 GMT

Run the code and test it.