MATLAB Onramp 14.1 Project- Stellar Motion Task 7

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?

[Divyanshu]

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]

Did you store the correct wavelength in lambdaHa?

Did you store the correct speed in speed?

Answer 1

[VAIBHAV PANDEY]

s = spectra(:,2)
[sHa,idx] = min(s)
lambdaHa = lambda(idx)
z = lambdaHa/656.28 - 1
speed = z*299792.458

[SIRAJ]

thanks bro...

[yash chawan]

this is not the right ans i have tried it

[Jayleen]

just take the second and third line for task 4

[Deeksha]

tast 2 & 7

s=spectra(:,2)

Did you store the second column of spectra in s?------> this error is not remove..why?

[James D]

Why

[patrick]

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

Answer 2

[Othello Deemi]

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.

[KHAOULA]

same prb

Answer 3

[leela krishna]

[sHa,idx]=min(s)
lambdaHa=lambda(idx)
hold on
x=lambdaHa
y=sHa
plot(x,y,'rs','MarkerSize',8)

Answer 4

[Prabhan Purwar]

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

Answer 5

[PERUMALSAMY ROHANKUMAR]

[sHa,idx] = min(spectra(:,2))

to

[sHa,idx] = min(spectra)

[Ganisher]

how will be the next step's code?

Did you add a point to the existing axes?

Add a point to the existing axes by plotting x = lambdaHa, y = sHa as a red square ("rs") with a marker size ("MarkerSize") of 8.

[Öznur]

hold on

plot(lambdaHa,sHa,"rs",'MarkerSize',8)

[NITHARSANA]

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

Answer 6

[duvan]

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.