Don't know why it is showing incorrect?

I get an incorrect mark in the task(2) of 13.2 section of Matlab onramp course.Even if i saw the solution in the see solution option and entered the same the error still shows.

the task is given below:

Modify the script so that when the if condition is not satisfied, the following line of code is executed:

disp("The density of " + element ...

+ " is " + density)

[Sriram Tadavarty]

Hi Varun,

Make sure if you included the condition correctly. A screenshot about the issue will help.

% For example, taking random values, as the values and condition is not known
element = 1;
density = 10;
cond = 0;
if ~(cond)
    disp("The density of " + element ...
    + " is " + density)
end

This should work.

Can you once try in the above lines and do let know?

Regards,

Sriram

[Syed Hammad]

I have also face the same problem. Also use above code but still facing the same error

error is: "Are the densities displayed when doPlot is 0?"

[Harpreet Singh Whan]

@ Sriram Sir, i am facing the same problem too. it isn"t working!

[Sriram Tadavarty]

I just did try now and it works again.

Can you share your code that you tried? If possible even the screenshot showing the error of onramp.

[Sachin Chavan]

i am facing same problem

[Héctor Mauricio]

if doPlot
    plot(density)
    title("Sample Densities")
    xticklabels(element)
    ylabel("Density (g/cm^3)")
else
    x=("The density of " + element ...
    + " is " + density)
    disp(x)
    plot=[];
end

Answer 1

[ravi meena]

It will work when you enter the code carefully. For example, if you will enter

disp("The density of" + element...
   + " is " + density )

it will not work but, instead of this enter

disp("The density of " + element...
   + " is " + density )

there is a space after of and it will work.

[Image Analyst]

But the space after the "of" has no bearing on if the program will get to the disp() line of code. It only affects what the code looks like. Sriram's code should work. However if the answer checking looks for an exact character by character match in the command window then the space would be necessary. I'm/we're just not sure how they determine if the disp() line was arrived at.

[Abhay Rajendra Pangavhane]

write the sentense as it is with correct spaces

[Steven Lord]

Image Analyst, from the failures people have been posting about on Answers this task checks that the line of code displays exactly the message (with spaces) displayed by that sample disp statement.

I'll report this confusion to the MATLAB Onramp team -- maybe there's some way we can make the result message clearer when the student's code displays a message but displays it without spaces.

[Naveed Zaffarullah Memon]

I am facing the same problem , should i consider it correct for myself or i shoud keep trying?

[Walter Roberson]

The question posted says,

"Modify the script so that when the if condition is not satisfied, the following line of code is executed:"

You should be copying the exact line of code they provide. The students who used (for example)

disp("The density of" + element...
   + " is " + density )

are not using the required line of code, because the required line of code has a space after the "of" .

[B Shashank Mallya]

Thanks man it worked

[Venkateshan Shanmugam]

Im still facing the problem

[Walter Roberson]

@Venkateshan Shanmugam

We do not know what code you are using.

[ajibola]

thank you, it works

Answer 2

[Ryan Leman]

Just letting everyone know that I am having the same kind of issue on audio frequency tasks.

I even clicked on "see solution" and copy & pasted the entire thing so my version and the solution are identical. I submitted a report about this a few minutes ago w/ screen shot. I also noticed that it takes a little bit longer than usual to load the whole incorrect answer thing, maybe there is a bug causing it to timeout?

[Ryan Leman]

little more info that might be relevant. My internet connection is fine however I did ping the host and got this.

Update: It seems to be working now, it finally let me pass. I think there might be some server silliness going on atm. I pinged it again at the time Onramp was working correctly and the ping was fine this time around. However a did it again a few moments after and got the same message as the picture below (the picture was from my original comment). This might also support the server silliness hypothesis.

Answer 3

[Kumar Shubham]

insert the spaces properly especially after of.

Answer 4

[Sandra Feliciano]

if doPlot==1
plot(density)
title("Sample Densities")
xticklabels(element)
ylabel("Density (g/cm^3)")
else
  disp("The density of " + element ...
    + " is " + density)
end