### problems 1 and 3 matlab problems 1 and 3 matlab problems 4 7 consider the matrix a 3 5153490

Problems 1 and 3 MATLAB

Problems 1 and 3 MATLAB

Problems 4 7 .Consider the matrix A= 3 Request the matrix from the user with the input command. With the find command, use a print command to print these results to the 4 6 8 2 Command Window: a) Programmatically count how many elements of the matrix A are equal to 4 b) Programmatically count how many elements of the matrix A are less than 5 or greater than 7. . In Lecture 04 we discussed the merits of the atan2 command. Create a programmer-defined function atan3 that mimics the functionality of atan2. Remember that the form of the function atan2 is atan2 (y, x) . The quadrant correction is to add r to the result of the inverse tangent calculation if 0; no correction is made to the result of the inverse tangent calculation if okay if your result is off by a perlod, or 2T) 0. Note that atan2 returns a valueE-, ]. though your atan3 function need not constrain the result to that interval (i.e. it is In a script, test your atan3 function against the built-in atan2 function. . The function f (x) = ln{z) is defined over the real numbers (p) for E (0, 00) (though MATLAB will report ]n(0) as-Inf).Use an if selection structure to check if the inputted f() according to these three cases: value of Is In the domain is not in the domain of f(r) (ie. if E (-o, 0, use the error command to print an error message to the Command Window Case 1: If the inputted Case 2: If the inputted is on the domain (0, 1), use the warning command to print a warning to the Command Window stating that the value of f()will be less than O. , oo) then calculate and print to the Command Window the value of f(). Case 3: If the inputted is in the domain Hint: What are the branches in this selection structure? Identify them first, then begin to program the cases. E [0.5] then is defined within (or “belongs to”) that range of NB: The symbol E is a mathematical symbol that can be interpreted in English as “is an element of” For example, if numbers. You will likely recall from calculus that parentheses indicate a specific interval does not include the end-point (a so-called “open interval”), while brackets indicate that the nterval does include the end point (a so-called “closed interval”)