Program that orders data from highest to lowest

Hello to all the community, I need your help to make a program in matlab that:

1 ask the user for the amount of data

2 that the user enter the data

3 that the program returns the data ordered from highest to lowest

4 that the program indicates if the greater number is even or odd

5 that the program indicates if the smaller number is odd or even

Greetings to all, and many for your help.

[James Tursa]

What have you done so far? What specific problems are you having with your code?

[Mauro Mijangos]

I don't know how to start the code, I don't know how to apply the bubble algorithm for this case.

[James Tursa]

For 1 and 2, see this function:

https://www.mathworks.com/help/matlab/ref/input.html?searchHighlight=input&s_tid=srchtitle

For 3, see the bubble sort algorithm here:

https://en.wikipedia.org/wiki/Bubble_sort

Just pick one of the pseudo-code examples and rewrite it using MATLAB syntax. E.g., use ( ) instead of [ ] and use 1-based indexing instead of 0-based indexing.

For 4 and 5, I don't understand the instructions. If it is simply to determine if the largest and smallest numbers are even or odd, see this function:

https://www.mathworks.com/help/matlab/ref/mod.html?searchHighlight=mod&s_tid=srchtitle

or this function:

https://www.mathworks.com/help/matlab/ref/rem.html?searchHighlight=rem&s_tid=srchtitle

[Mauro Mijangos]

Can you help me with the code??

[James Tursa]

Work on getting just code for 1 and 2 first. Use an example from the link and see if you can get code that will ask the user for a number and store that in a variable. This is very simple code and you should be able to get it working very quickly by using the example.

[Mauro Mijangos]

I tried to make the code, but it did not work, I attach the file.

[Mauro Mijangos]

Help me , plis

[Rik]

Which part doesn't work? I see you only used input to ask the user how many numbers they want to enter, but not to actually enter them. (your code also has trailing end, which I will assume is a typo)

I would also suggest adding comments about what your code is doing, preferably in English, as that would make it easy to share here. I took the liberty or re-translating the instructions.

clear,clc

%step 1: ask the user for the amount of data
tamano=input('INGRESE NUMERO DE DATOS\n');

%step 2: let the user enter the data
fprintf('INTRODUZCA LOS %d DATOS',tamano);

%step 3a: sort the data highest to lowest
%this is the bubble sort algorithm
cont=0
cont=cont+1
for j = i+1:i<tamano-1:cont
    for j=i+1:j<tamano:cont
        if(num(j)<num(i))
            temp=num(j);
            num(j)=num(i);
            num(i)=temp
        end
    end
end

%step 3b: return the data ordered from highest to lowest
fprintf('LOS NUMEROS ORDENADOS SON:\n')
for i=0:i<tamano:cont
    fprintf('%d,'mun(i))
end

%step 4: indicate if the largest number is even or odd

%step 5: indicate if the smallest number is odd or even

fprintf('\n\n\n')

[Mauro Mijangos]

when I run the progrmam it marks me this:

INGRESE NUMERO DE DATOS

20

INTRODUZCA LOS 20 DATOSWarning: Colon operands must be real scalars.

> In MAYOR_A_MENOR (line 14)

LOS NUMEROS ORDENADOS SON:

Warning: Colon operands must be real scalars.

> In MAYOR_A_MENOR (line 26)

clear
clc

%step 1: ask the user for the amount of data
tamano=input('INGRESE NUMERO DE DATOS\n');

%step 2: let the user enter the data
fprintf('INTRODUZCA LOS %d DATOS',tamano);

%step 3a: sort the data highest to lowest
%this is the bubble sort algorithm
cont=0;
cont=cont+1;
for j = i+1:i<tamano-1:cont
    for j=i+1:j<tamano:cont
        if(num(j)<num(i))
            temp=num(j);
            num(j)=num(i);
            num(i)=temp;
        end
    end
end

%step 3b: return the data ordered from highest to lowest
fprintf('LOS NUMEROS ORDENADOS SON:\n')
for i=0:i<tamano:cont
    fprintf('%d',mun(i))
end

%step 4: indicate if the largest number is even or odd

%step 5: indicate if the smallest number is odd or even

fprintf('\n\n\n')

[Jan]

What is the purpose of this code:

cont=0;
cont=cont+1;

Easier:

cont = 1;

Your code fails in this line:

for j = i+1:i<tamano-1:cont

because i is not defined as a variable. Then it is the the imaginary unit.

There are more problem:

1. "fprintf('INTRODUZCA LOS %d DATOS',tamano);" This does no let the user input data. Use the input() command again in a loop.
2. "for j = i+1:i<tamano-1:cont" - Please read the documentation:

doc for

Better:

for i = 1:tamano
    for j = i+1:tamano

3. The same problem here: "for i=0:i<tamano:cont". This is not the way for loops work in Matlab.

[Mauro Mijangos]

can you help me with the code ??

[Rik]

You are being helped with the code. Did you read the documentation for the functions Jan suggested? We are not going to do your homework for you.