Community Profile

photo

ChrisR


Last seen: Today
2.238 total contributions since 2015

Faculty member in civil & environmental engineering

ChrisR's Badges

  • Strings I Master
  • Famous
  • Cody Problems in Japanese Master
  • Promoter
  • Magic Numbers II Master
  • Sequences And Series I Master
  • ASEE Challenge Master
  • Matrix Patterns II Master
  • Number Manipulation II Master
  • Indexing II Master
  • Leader
  • Puzzler
  • Indexing I Master
  • Number Manipulation I Master
  • Speed Demon

View all

Contributions in
View by

Solved


Calculate the sphericity of a Raschig ring
Sphericity is a measure of the roundness of any particle. It was defined by Wadell in 1935 as the ratio of the 'surface area of ...

etwa 17 Stunden ago

Solved


Divisible by n, prime divisors - 11, 13, 17, & 19
Divisibility checks against prime numbers can all be accomplished with the same routine, applied recursively, consisting of add ...

ein Tag ago

Solved


Basic Addition

ein Tag ago

Solved


Evaluate the logarithmic integral
The <https://en.wikipedia.org/wiki/Logarithmic_integral_function logarithmic integral> li(x) plays a role in number theory becau...

2 Tage ago

Solved


Set Soldner's constant

2 Tage ago

Solved


Long-digit Subtraction
Suppose you need to subtract a very large integer from another integer. <http://www.mathworks.com/matlabcentral/cody/problems/56...

3 Tage ago

Solved


COUNT LETTERS
Count the number of letters in a given string. For Example: STR='The MAtlAb code'; output:T 2 H 1 E 2 M 1 A 2 L 1 B 1 C ...

3 Tage ago

Solved


Reverse CHECKBOX MATRIX with 69
Create a reverse checkbox matrix with '69'. Where the size is the input and output will be a square checkbox matrix. Exa...

3 Tage ago

Solved


A kind of decryption
Please convert the vector to letters by referring to the examples below. (eg.1) input vec=[34 1 59] >>> output s='A Z' (eg...

4 Tage ago

Solved


find the answer

4 Tage ago

Solved


Clock Hand Angle 1
Given a time in HH:MM:SS, find the smallest angle (in degrees) between the hour and minute hand

6 Tage ago

Solved


Make a diamond
Given n, odd number > 1, return n by n matrix consist of "null" and "*" characters arranged like a diamond. No toolbox funct...

6 Tage ago

Solved


CARDS PROBLEM
Read my mind and tell me the card number that I have now in my hands.

6 Tage ago

Solved


Pentagonal dodecahedron
<<https://upload.wikimedia.org/wikipedia/commons/7/73/Dodecahedron.gif>> Pentagonal dodecahedron is a dodecahedron that is ...

6 Tage ago

Solved


How to find the position of an element in a vector without using the find function
Write a function posX=findPosition(x,y) where x is a vector and y is the number that you are searching for.

7 Tage ago

Solved


cofactor matrix
given a matrix, find its cofactor matrix <https://en.wikipedia.org/wiki/Minor_(linear_algebra)#Inverse_of_a_matrix>

7 Tage ago

Solved


Please check if calorie intake is less than 300 kcal.
I like eating some puddings and some chocolate cookies around 3 o'clock. However, I care about calorie intake. Please check whe...

7 Tage ago

Solved


Let's make puddings !
We will make puddings with eggs, milk and sugar. To make one pudding, we need one egg, 140(cc) of milk, 15 (g) of sugar. Now W...

7 Tage ago

Solved


I hope to lose weight healthily...
In order to reduce weight healthily, weight will be reduced by 4% every month. Please calculate how many months it will take...

7 Tage ago

Solved


Friday or not
I love Friday. Please tell me whether the day is Friday. Dateformat is 'yyyy-mm-dd' or 'dd-mmm-yyyy' or 'mm/dd/yyyy'. Exa...

7 Tage ago

Solved


Add 3 (x<=100) Or Subtract 100 and add 3(100<x)
Add 3 to every element. However, if the value is greater than 100, subtract 100 and add 3. eg. input x = [45 106; 67 1...

7 Tage ago

Solved


Find Logic 26

8 Tage ago

Solved


Find Logic 25

8 Tage ago

Solved


Sort a vector

8 Tage ago

Solved


Rule of mixtures (composites) - lower and upper bounds (volumes)
The <http://en.wikipedia.org/wiki/Rule_of_mixtures rule of mixtures> is used in the mechanical design of composite structures to...

8 Tage ago

Solved


Rule of mixtures (composites) - other bound
The <http://en.wikipedia.org/wiki/Rule_of_mixtures rule of mixtures> is used in the mechanical design of composite structures to...

8 Tage ago

Load more