Good day
How do we program this in SAS:
Log10(90*20*10^dilution)
Assuming there is a variable named dilution and it is numeric:
result =Log10(90*20*10**dilution);
hours = days * 24 ;
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.
@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.
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