MathWorks Support Team (view profile) MATLAB does not recognize the specified string as the name of a function on the MATLAB path or a variable visible to that function. - a typographical error when typing a command or variable name (such as typing a 1 [one] when you intended to type an l [low-case L]).
Blood tests can detect cocaine itself for about 12 hours after use. Urine tests check for metabolic byproducts of cocaine, and in infrequent users a urine test is positive for up to two to three days after cocaine use.
If youâre asking how long does the high last when you smoke cocaine, the effects and blood levels of cocaine peaks at 45 minutes when you are smoking cocaine base. If youâre asking how long does cocaine stay in your system when you smoke it, itâs about the same for smoking as it is for snorting or oral ingestion.ery low concentrations of cocaine may be detected in urine during the initial few hours after use. In general, cocaine metabolites like benzoylecgonine can be detected in urine 2â4 days after use for sporadic users and up to 12 days after use for chronic users or following a binge.