MATLAB: Decision Branching Error in matlab onramp

MATLAB

How to crack this error? The input data and solution provided by the matlab sources are same still the error is occuring.

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That might be checking that the densities that are printed as text when doPlot is 0 exactly match the densities that would be printed by "the code as shown above". The code you're using doesn't exactly match: note that your code doesn't display a space between "of" and the name of the element. Try adding the spacing before and after the element name (as I believe "the code as shown above" does) and see if that allows you to pass the test case.

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MATLAB: Toggle and elseif in matlab

Shivaani - I think that all the code is asking you to do is to add another variable called doDisplay and an elseif that would check if this variable is true. If so, then you would plot the densities. So there would be two ways to plot the data - either through the doPlot or with the doDisplay

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

You would need to declare and initialize the doDisplay variable too.

MATLAB: If-elseif-else-end structure doesn’t work properly

Consider your lines

if solid == cube
  volume = cube(a)

The second of those lines shows us that "cube" is a function. In the "volume =" line, the function is invoked with one argument.

Now look again at the first of those lines. "cube" appears there, and we know that "cube" is a function, so when "cube" occurs there, that means to invoke the function "cube" with no arguments, just as if you had written

if solid == cube()

Then whatever is returned from the cube() function will be compared to the value you input for "solid". As those values probably do not match, the "elseif" branch will be invoked, but the code there has the same issue...

I predict that the corrected code would be

solid = input('Welcome to Volume Calculator - Please enter the solid for which you would like to calculate the volume: ', 's');
    if strcmpi(solid,'cube')
          volume = cube(a)
    elseif strcmpi(solid, 'sphere')
            volume = sphere(r)
    elseif strcmpi(solid, 'prism')
           volume = prism(a,b,c)
    else   disp('Only certain solids can be calculated. Please try again')
    end

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Related Solutions

MATLAB: Toggle and elseif in matlab

MATLAB: If-elseif-else-end structure doesn’t work properly

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