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UCB - MCD4550 - Engineering Numerical Analysis - Trimester 2 - 2025

UCB - MCD4550 - Engineering Numerical Analysis - Trimester 2 - 2025

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A txt file which contains only numerical data is imported using importdata() and assigned to X. Which of the following is true?

X is a structure

X is a character

X is empty

X is a string

X is a double

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Given a structure named Z, which of the following would access the numerical data field of that structure?

Z.data

Z.numerical

fopen(Z)

num2str(fgetl(Z))

Z.double

Given a structure named Z, which of the following would access the text data field of that structure?

Z.colheaders

fopen(Z)

Z.textdata

num2str(fgetl(Z))

string(Z)

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What are the plot characteristics of the following command?

plot(x,y,'ro-')

Orange rectangles, dashed line

Orange rectangles, continuous line

Red circles, continuous line

Red, dashed-dot line

Red circles, dashed line

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Which of the following strings fills in the shape of a marker with a colour in the plot function?

'MarkerFillColor'

'MarkerFullColor'

'MarkerEdgeColor'

'MarkerFaceColor'

✅

'LineWidth'

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Which of the codes will produce a plot with logarithmically scaled axes?

X = 1:10; 
Y=log10(X); 
plot(X,Y)

X = log10(1:10); 
Y = log(X); 
plot(X,Y)

None of the above

X = 1:10; 
Y = log(X); 
loglog(X,Y)

✅

X = log(1:10); 
Y = log(X); 
plot(Y,X)

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Which of the following commands will lead to an error in Matlab?

B.*C

❌

B*C

None of the above

100%

B.*C'

B'.*C

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