Contents
- 1 Problem 42641. MATLAB Basic: rounding
- 2 Problem 42642. MATLAB Basic: rounding II
- 3 Problem 42643. MATLAB Basic: rounding III
- 4 Problem 42644. MATLAB Basic: rounding IV
- 5 Problem 2559. Check that number is whole number
- 6 Problem 2866. Matlab Basics - Rounding II
- 7 Problem 2867. Matlab Basics - Rounding III
- 8 Problem 2120. Rounding off numbers to n decimals
- 9 Problem 43278. Make roundn function
- 10 Problem 713. Find the maximum number of decimal places in a set of numbers
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Visit the Matlab official Problems page of Basics – Rounding.
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Problem 42641. MATLAB Basic: rounding
Do rounding near to zero
Example: -8.8, answer -8
+8.1 answer 8
function y = round_zero(x)
y = fix(x);
endProblem 42642. MATLAB Basic: rounding II
Do rounding nearest integer.
Example: -8.8, answer -9
+8.1 answer 8
+8.50 answer 9
function y = round_x(x)
y=round(x);
endProblem 42643. MATLAB Basic: rounding III
Do rounding towards minus infinity.
Example: -8.8, answer -9
+8.1 answer 8
+8.50 answer 8
function y = round_x(x)
y=floor(x);
endProblem 42644. MATLAB Basic: rounding IV
Do rounding towards plus infinity.
Example: -8.8, answer -8
+8.1 answer 9
+8.50 answer 9
function y = round_x(x)
y=ceil(x);
end
Problem 2559. Check that number is whole number
Check that number is whole number Say x=15, then answer is 1. x=15.2 , then answer is 0.
function y = your_fcn_name(x)
y = floor(x) == x;
endProblem 2866. Matlab Basics - Rounding II
Write a script to round a variable x to 3 decimal places:
e.g. x = 2.3456 –> y = 2.346
function y = round_3_d_p(x)
y = round(x, 3);
endProblem 2867. Matlab Basics - Rounding III
Write a script to round a large number to the nearest 10,000
e.g. x = 12,358,466,243 –> y = 12,358,470,000
function y = round_ten_thou(x)
y = round(x, -4);
endProblem 2120. Rounding off numbers to n decimals
Inspired by a mistake in one of the problems I created, I created this problem where you have to round off a floating point number to n decimals. There are 2 inputs to the function: x: floating point number and n: number of decimals which need to match with the given solutions.
function y = myround(x,n)
y = round(x, n);
endProblem 43278. Make roundn function
Make roundn function using round.
x=0.55555
y=function(x,1)
y=1
y=function(x,2)
y=0.6
y=function(x,3)
y=0.56
function y = myroundn(x,n)
y = round(x, n-1)
endProblem 713. Find the maximum number of decimal places in a set of numbers
Given a vector or matrix of values, calculate the maximum number of decimal places within the input. Trailing zeros do not count as significant. No significant digits will result in an answer of 0.
For example:
x = [0.01 0.888 1.0 40.151 39.1244];
y = 4;
The maximum number of significant decimal places from the input is 4 (39.1244).
function y = find_max_sigdec(x)
longest = 0;
for i = 1 : length(x)
temp = strsplit(num2str(x(i)),'.');
if length(temp) > 1
result = length(temp{2});
if result > longest
longest = result
end
end
end
y = longest
endBasics – Rounding Cody 10 solved problems. All solution is correct as they were first submitted in Matlab and then uploaded here for your help. If any solution doesn’t work then do comment.
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