测控软件技术基础周鑫.doc

测控软件技术基础 姓名：周鑫 班级：232131 学号：20131000982 指导老师：黄玉金 Basic Syntax and Command-Line Exercises 1. Create a vector of the even whole numbers between 31 and 75. 代码:x=32:2:75 2. Let x = [2 5 1 6]. a. Add 16 to each element b. Add 3 to just the odd-index elements c. Compute the square root of each element d. Compute the square of each element 代码：a=x+16; b = x(1:2:end) + 3 c = sqrt(x) d = x.^2 5. Create a vector x with the elements ... 代码：a = 2:2:20 b = 10:-2:-4 c1 = 1:5, c2 = 1./c1 , rats(c2) d1 = 0:4, d2 = 1:5, d3 = d1./d2 , rats(d3) 6. Create a vector x with the elements, xn = (-1)n+1/(2n-1) Add up the elements of the version of this vector that has 100 elements. 代码：n = 1:100; x = ( (-1).^(n+1) ) ./ (2*n - 1); y = sum(x) 10. Make a good plot (i.e., a non-choppy plot) of the function f(x) = sin(1/x) for 0.01 x 0.1. How did you create x so that the plot looked good? 代码：x=0.01:0.0001:0.1;y=sin(1./x);plot(x,y) Basic Array Syntax and Manipulations 1. Given x = [3 1 5 7 9 2 6], explain what the following commands mean by by summarizing the net result of the command. a. x(3) b. x(1:7) c. x(1:end) d. x(1:end-1) e. x(6:-2:1) f. x([1 6 2 1 1]) g. sum(x) 答： x（3）表示x行向量中的第三个元素。x(1:7)表示x行向量中第1到7个元素。x(1:end)表示x行向量中第1到最后一个元素。x(1:end-1)表示x行向量中第1到倒数第二个元素。x(6:-2:1)表示x行向量中第6个元素到第1个元素中的偶数项元素。x([1 6 2 1 1])：方括号中表示x行向量中元素的序号，整个表示由这些元素组成的新行向量。sum(x)：表示x中所有元素求和。 2. Given the array A = [ 2 4 1 ; 6 7 2 ; 3 5 9], provide the commands needed to a. assign the first row of A to a vector called x1 b. assign the last 2 rows of A to an array called y c. compute the sum over the columns of A d. compute the sum over the rows of A e. compute the standard error of the mean of each column of A (NB. the standard error of the mean is defined as the standard deviation divided by the square root of the number of elements