Cephas
St. Josephs College of Engineering
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ECE undergraduate passionate about Signal Processing, Wireless Communications (5G/6G), and Intelligent Automation. I enjoy solving problems using MATLAB and Python, especially in domains like RF systems, image processing, and AI model deployment. Currently exploring advanced topics in space communications, radar, and applied machine learning. Always curious, learning, and sharing knowledge through MATLAB Cody challenges and technical projects.
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Problem 61065. Convert Hexavigesimal to Decimal
The challenge: You are given a string of lowercase letters 'a' to 'z'. Each character represents a base-26 digit: 'a' = 0 1....
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Tip for Problem 61059 – Leaderboard for the Nedball World Cup:
To track the current leader after each match, you can use cumulative scores. First, calculate the cumulative sum for each player...
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Logical Indexing Is Gold
Instead of looping with if-statements, use logical indexing: A(A < 0) = 0; One line, no loops, full clarity.
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Use mod() for Cyclic Problems
Whenever a problem repeats in cycles (like indexing or angles), mod() keeps your logic clean: idx = mod(i-1, n) + 1; No if-els...
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Preallocating Arrays Matters
Instead of growing arrays inside a loop, preallocate with zeros(), ones(), or nan(). It avoids memory fragmentation and speeds u...
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Always Read the Example Output Carefully
Cody often hides subtle hints in example outputs — like data shape, rounding, or format. Matching those exactly saves you a lot ...
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Know When to Use isequal()
isequal() is your best friend for Cody! It compares arrays perfectly without rounding errors — much safer than == for matrix out...
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Debugging Hidden Test Cases
When Cody hides test cases, test your function with random small inputs first. If it works for many edge cases, it will almost a...
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Vectorization Over Loops
I realized that using vectorized logic instead of nested loops makes Cody problems run much faster and cleaner. Functions like a...
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Clueless - Lord Ned in the Game Room with the Technical Computing Language
[Warning: this is a nontrivial programming problem] Worried about the decline in reasoning skills in the clueless populace of...
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Who Holds the Lord Ned Challenge Shield?
During the Nedball Premier League regular season, each of the n teams plays each of the other (n-1) teams twice, once at home an...
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Popular Word Game™ Distance
Professor Ned, who holds the Nedowed Chair of Crackpot Mathematics at the University of Nedsburg, has recently discovered the da...
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The Bridges of Nedsburg
The fabled city of Nedsburg consists of several islands connected by bridges. Due to tectonic forces, shoddy civil engineering, ...
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A Nedlish Country Garden - Check for Valid Arrangement
Nedland is famous for its stately gardens, which typically have a centerpiece of a square grid, with certain squares featuring a...
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Average Number of Moves for the Royal Game of Err
Bored of tedious court assemblies, King Neduchadneddar the Procrastinator has found a cunning way to keep his advisors, councilo...
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Transition Matrix for the Royal Game of Err
Bored of tedious court assemblies, King Neduchadneddar the Procrastinator has found a cunning way to keep his advisors, councilo...
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Convert Decimal to Hexavigesimal
NASA (Ned’s Alien-Spying Agency) have made contact with a 13-fingered race from the planet Genai. Naturally, Ned’s shadowy opera...
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Convert Hexavigesimal to Decimal
NASA (Ned’s Alien-Spying Agency) have made contact with a 13-fingered race from the planet Genai. Naturally, Ned’s shadowy opera...
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Leaderboard for the Nedball World Cup
At the upcoming inaugural Nedball World Cup, organizers need to track who is in the lead for the coveted Golden Toeplitz trophy,...
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Government of the Neds, by the Neds, for the Neds - Distribute the Nedsburg City Councilors
The city of Nedsburg consists of several islands, the number of which changes regularly, due to tectonic forces, shoddy civil en...
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Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...
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