what is wrong with my code?

Question

Purvil Patel 2017-4-30

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评论： James Tursa 2018-8-13

Write a function called light_speed that takes as input a row vector of distances in kilometers and returns two row vectors of the same length. Each element of the first output argument is the time in minutes that light would take to travel the distance specified by the corresponding element of the input vector. To check your math, it takes a little more than 8 minutes for sunlight to reach Earth which is 150 million kilometers away. The second output contains the input distances converted to miles. Assume that the speed of light is 300,000 km/s and that one mile equals 1.609 km.

Problem 6 (light_speed):
                                       Testing with argument(s) 150000000
    
Feedback: Your program made an error for argument(s) 150000000
      Your solution is _not_ correct.
>> [tt ee] = light_speed1([370000000,170000000,530000000])
tt =
20.5473    9.4407   29.4327
ee =229906900   105632900   329326100

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Image Analyst 2017-4-30

How can that be? There is no way you can get a correct answer if you can't even run the program!

Anupriya Krishnamoorthy 2018-1-25

function [time_in_minutes,distance_in_miles] = light_speed(distance_km) time_in_minutes = distance_km /(18000000); distance_in_miles = distance_km / 1.609; end

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Answer 1

Image Analyst 2017-4-30

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distances = velocity * time, so time = distances/velocity. Of course you have to make sure the units work out. But you forgot to include your code so we don't know how to fix it. Chances are your unit scaling factors are wrong.

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Answer 2

shantam sultania 2018-8-13

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编辑：James Tursa 2018-8-13

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i have a problem in this code i think that the code is right but the thing is i am always getting only one output

%code is : 
function [time,dist] = light_speed(distance) 
time = distance /(18000000); 
dist = distance / 1.609;
end
%output is 
>> light_speed(distance);
>> f=light_speed(distance);
>> f
f =
      0.4000    0.6000    0.8000
>>