LOG10 FUNCTION IN SAS

[Dinkepile]

Good day

How do we program this in SAS:

Log10(90*20*10^dilution)

[ballardw]

Assuming there is a variable named dilution and it is numeric:

result =Log10(90*20*10**dilution);

[Dinkepile]

Yes thank you.

Do you perhaps know a function that can turn a number of days and give
hours instead?

[Tom]

hours = days * 24 ;

[Dinkepile]

Thanks so much for your email.

Kind Regards
Dinkepile

[PhilC]

Wait, wait, wait!

result =Log10(90*20*10**dilution);
 /*
 ... =Log10(90*20) + Log10(10**dilution);
 ... =Log10(90*20) + dilution * Log10(10);
 ... =Log10(90*20) + dilution * 1;
*/
result =Log10(90*20) + dilution ;

List of logarithmic identities - Wikipedia

This is better for numerical precision purposes, I believe.

[ballardw]

---

@PhilC wrote:

Wait, wait, wait!

result =Log10(90*20*10**dilution);
 /*
 ... =Log10(90*20) + Log10(10**dilution);
 ... =Log10(90*20) + dilution * Log10(10);
 ... =Log10(90*20) + dilution * 1;
*/
result =Log10(90*20) + dilution ;

List of logarithmic identities - Wikipedia

This is better for numerical precision purposes, I believe.

---

Probably.