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MATLAB linkedin answers

Which statement is equivalent to this for loop?

a = [1 2 3; 4 5 6];

b = zeros(size(a));

for i_row = 1:size(a,1)

    for i_col = 1:size(a,2)

        b(i_row,i_col) = a(i_row,i_col)^2;

    end

end

• b = a^2;
• b = pow2(a);
• b = a.^2;
• b = a*a;

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You have plotted values of cosine from -10 to 10 and want to change the x-axis tick marks to be every pi, from -3*pi to 3*pi. Which statement will do that? 

• xticks(-3*pi:pi:3*pi)
• xticks(-3*pi:3.14:3*pi)
• xticks(linspace(-3*pi(),3*pi(),pi())
• xticks(linspace(-3*pi,3*pi,pi)

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What is the value of c?

a = ones(1,3);

b = 1:3;

c = conv(a,b)

•  [-1 2 -1]
•  [1 3 6 5 3]
•  6
•  [1 -2 1]

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Which function CANNOT be used to randomly sample data?

•  datasample
•  randi
•  resample
•  randperm

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What is true of a handle class object?

• All copies of handle objects refer to the same underlying object.
• Handle objects do not have a default eq function.
• Handle objects cannot reference one another.
• When you pass a handle object to a function, a new object is made that is independent of the original.

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