Question

CSCI 251 Lab 6 File I/O Due Data: Nov 22, 2019 Problem Statement Given a text file with experiment data, implement a program that performs following operations: 1) Reads data from a text file. 2) Extract numerical data. 3) Sorts the data in a descending order (max to min). 4) Save the sorted result to a new text file. Algorithms: 1. Use the input_data.txt file as the input for your program. It can be downloaded from the blackboard. 2. Extract numerical data. 3. Sort the numerical data with sort() function in a descending order. *You can either Google or use the MATLAB built-in function helper (type help sort in the Command Window) to find out how to use the sort() function. 4. Save the sorted data to a new file name output_data.txt. Input: 1. input_data.txt Output: 1. output_data.txt Hints 1. For File 1/0, use readmatrix() and writematrix() functions. Sample outputs: 1. Double click the output_data.txt file in MATLAB. 2. Compare your data with the sample output (first and last ten lines are given).

Can this be solved in MATLAB language?

Answer 1

Assuming the input data is given in the file sequentially as numbers. Please find the required MATLAB script as the following:

%=================================================

clc;
clear all;

data = load('input_data.txt'); % Loading input data into data variable
sorted_data = sort(data,'descend'); % Sorting the data
fileOut = fopen('output_data.txt','w');  
fprintf(fileOut,'%f\n',sorted_data); % Writing the data
fclose(fileOut);

%==================================================