Cody

Problem 691. Number of bytes required to store a sparse matrix

Solution 89223

Submitted on 16 May 2012
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Test Suite

Test Status Code Input and Output
1   Pass
% I have rescored solutions , somme asserts were missing in the test suite

2   Pass
%% x = sparse(100,1000,0.01); y_correct = 4016; assert(isequal(your_fcn_name(x),y_correct))

3   Pass
%% x = sparse(10000,10000,pi); y_correct = 40016 assert(isequal(your_fcn_name(x),y_correct))

y_correct = 40016

4   Pass
%% x = sparse(10,15); y_correct = 76 assert(isequal(your_fcn_name(x),y_correct))

y_correct = 76

5   Fail
%% B = [ 41 11 0 52 22 0 63 33 13 74 44 24 ]; d = [-3 0 2]; x = spdiags(B,d,7,4) y_correct = 140 assert(isequal(your_fcn_name(x),y_correct))

Error: Assertion failed.

6   Pass
%% Random sparse matrix (harder) %x=sprand(100,1000,0.01); %z = whos('x') %y_correct = round(z.bytes) %your_sol = round(your_fcn_name(x)) %assert(isequal(round(your_fcn_name(x)),y_correct))

7   Pass
%% Prevents cheating filetext = fileread('your_fcn_name.m') assert(isempty(strfind(filetext, 'whos'))) assert(isempty(strfind(filetext, 'who')))

filetext = function y = your_fcn_name(x) y = 16*nzmax(x)+4*size(x,2); end %This code written by profile_id 2722350

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