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.
How long does cocaine stay in saliva or sweat? Saliva elimination of cocaine has a half-life of 2 hours, while some cases have reported cocaine concentrations in the saliva even after 19 hours. Generally. the peak level of cocaine concentrations in sweat is at 4.5 to 24 hours. People often underestimate how cocaine can be addictive.