MATLAB Onramp 14.1 Project- Stellar Motion Task 7

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Prem Pankaj
Prem Pankaj 2020-7-11
评论： NITHARSANA 2025-10-3，2:42
Modify the Task 2 & 7 section of the script so that it performs the red shift calculation on the second star in spectra, not the sixth.
I have changed s to the second column (s= spectra(:,2)), and that is right.
How do I get the correct values of lambdaHa and speed?
  2 个评论
Divyanshu
Divyanshu 2025-4-29
Modify the Task 2 & 7 section of the script so that it performs the redshift calculation on the second star in spectra, not the sixth.
Divyanshu
Divyanshu 2025-4-29
Did you store the correct wavelength in lambdaHa?
Did you store the correct speed in speed?

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回答（6 个）

VAIBHAV PANDEY
VAIBHAV PANDEY 2020-9-20
s = spectra(:,2)
[sHa,idx] = min(s)
lambdaHa = lambda(idx)
z = lambdaHa/656.28 - 1
speed = z*299792.458
  6 个评论
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patrick
patrick 2025-6-25
É preciso que a variavel s seja prenchida com o valor da 2 coluna antes de fazer a conta
s = spectra(:,2)
[sHa,idx] = min(s)
lambdaHa = lambda(idx)
z = lambdaHa/656.28 - 1
speed = z*299792.458

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Othello Deemi
Othello Deemi 2022-8-12
Could some kindly help me with Tasks 2&7 on the MATLAB Onramp on the topic "Project > Stella Motion"?
Here is my answer:
s = spectra(:,2)
[sHa, idx] = min(s)
lambdaHa = lambda(idx)
z = (lambdaHa/656.28) - 1
speed = z*299792.458
I cannot go further beyond this point. Many thanks.
leela krishna
leela krishna 2024-5-20
[sHa,idx]=min(s)
lambdaHa=lambda(idx)
hold on
x=lambdaHa
y=sHa
plot(x,y,'rs','MarkerSize',8)
Prabhan Purwar
Prabhan Purwar 2020-7-14
Hi,
The correct values for lambdaHa and speed are calculated using Task 4. At every Task whole of the script runs not the portion of the same.
Thanks
PERUMALSAMY ROHANKUMAR
[sHa,idx] = min(spectra(:,2))
to
[sHa,idx] = min(spectra)
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NITHARSANA
NITHARSANA 2025-10-3，2:42

Add an if statement to the for loop body.if speed(v) is less than or equal to 0, create a plot of s against lambda using a dashed line(--). Add the command hold on between the two end keywords so that you only create one plot

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duvan
duvan 2025-8-26
Tarea
Modifique la sección Tasks 2 & 7 del script para que realice el cálculo del desplazamiento al rojo con la segunda estrella de spectra en lugar de la sexta.

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