Cody

Problem 2091. return row and column indices given 2 values which define a range

Solution 1151152

Submitted on 31 Mar 2017 by Elmar Zander
This solution is locked. To view this solution, you need to provide a solution of the same size or smaller.
Solve This Problem View on Solution Map

Test Suite

Test Status Code Input and Output
1   Pass
x1=magic(5); x2=3; x3=9; [R1,C1]=RCMatrixIndices(x1,x2,x3); [fr1,fc1]=find(and(x1>=x2,x1<x3)); assert(and(isequal(R1,fr1),isequal(C1,fc1)))

ind = 5×5 logical array 0 0 0 1 0 0 1 1 0 0 1 1 0 0 0 0 0 0 0 1 0 0 0 0 0 R = 1 1 1 1 1 2 2 2 2 2 3 3 3 3 3 4 4 4 4 4 5 5 5 5 5 C = 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 R = 3 2 3 2 1 4 C = 1 2 2 3 4 5
2   Pass
filetext = fileread('RCMatrixIndices.m'); assert(isempty(strfind(filetext, 'find')))
3   Pass
filetext = fileread('RCMatrixIndices.m'); assert(isempty(strfind(filetext, 'regexp')))
4   Pass
x1=magic(5); x2=3; x3=9; [R2,C2]=RCMatrixIndices(x2,x1, x3); [fr1,fc1]=find(and(x1>=x2,x1<x3)); assert(and(isequal(R2,fr1),isequal(C2,fc1)))

ind = 5×5 logical array 0 0 0 1 0 0 1 1 0 0 1 1 0 0 0 0 0 0 0 1 0 0 0 0 0 R = 1 1 1 1 1 2 2 2 2 2 3 3 3 3 3 4 4 4 4 4 5 5 5 5 5 C = 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 R = 3 2 3 2 1 4 C = 1 2 2 3 4 5
5   Pass
x1=magic(5); x2=3; x3=9; [R3,C3]=RCMatrixIndices(x1,x3,x2); [fr1,fc1]=find(and(x1>=x2,x1<x3)); assert(and(isequal(R3,fr1),isequal(C3,fc1)))

ind = 5×5 logical array 0 0 0 1 0 0 1 1 0 0 1 1 0 0 0 0 0 0 0 1 0 0 0 0 0 R = 1 1 1 1 1 2 2 2 2 2 3 3 3 3 3 4 4 4 4 4 5 5 5 5 5 C = 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 R = 3 2 3 2 1 4 C = 1 2 2 3 4 5
6   Pass
A=... [3 3 3 3;... 8 3 3 3;... 8 8 3 3;... 8 8 8 3]; lowlim=3; uplim=9; [R4,C4]=RCMatrixIndices(A,uplim,lowlim); assert(length(A(4*(C4-1)+R4))==16)

ind = 4×4 logical array 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 R = 1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 4 C = 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 R = 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 C = 1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 4
7   Pass
A=... [3 3 3 3;... 8 3 3 3;... 8 8 3 3;... 8 8 8 3]; lowlim=4; uplim=9; %extract only 8 [R5,C5]=RCMatrixIndices(A,uplim,lowlim); assert(all(A(4*(C5-1)+R5)==8))

ind = 4×4 logical array 0 0 0 0 1 0 0 0 1 1 0 0 1 1 1 0 R = 1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 4 C = 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 R = 2 3 4 3 4 4 C = 1 1 1 2 2 3
8   Pass
A=... [3 3 3 3;... 8 3 3 3;... 8 8 3 3;... 8 8 8 3]; lowlim=4; uplim=7; [R6,C6]=RCMatrixIndices(A,uplim,lowlim); assert(and(isempty(R6),isempty(C6)))

ind = 4×4 logical array 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 R = 1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 4 C = 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 R = 0×1 empty double column vector C = 0×1 empty double column vector
9   Pass
A=... [3 3 3 3;... 8 3 3 3;... 8 8 3 3;... 8 8 8 3]; lowlim=2; uplim=7; [R7,C7]=RCMatrixIndices(A,uplim,lowlim); assert(and(all(A(4*(C7-1)+R7)==3),length(R7==10)))

ind = 4×4 logical array 1 1 1 1 0 1 1 1 0 0 1 1 0 0 0 1 R = 1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 4 C = 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 R = 1 1 2 1 2 3 1 2 3 4 C = 1 2 2 3 3 3 4 4 4 4
10   Pass
A=1; lowlim=1; uplim=1; [R8,C8]=RCMatrixIndices(A,uplim,lowlim); assert(and(isempty(R8),isempty(C8)))

ind = logical 0 R = 1 C = 1 R = [] C = []
11   Pass
A=1; lowlim=1; uplim=2; [R9,C9]=RCMatrixIndices(A,uplim,lowlim); assert(and(R9==1,C9==1))

ind = logical 1 R = 1 C = 1 R = 1 C = 1

Suggested Problems

More from this Author10

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!