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.
Other tests *Hair Testing for Snow (A hair test can reveal cocaine use up to 90 days after use.) *Snow Detection in Saliva (Coke can be detected in saliva for 24 hours after use.) *Urine Tests for Cocaine Use (Cocaine is detectable by standard drug tests on urine up to 72 hours after use.