Questions tagged [loglog]
65 questions
0
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log-log plot and power function fitting
I try to fit a power function using a lm on log-log plot data mentioned here https://statisticsbyjim.com/regression/log-log-plots/ using a mammal dataset . I used the following code according the description but fail reproduce the results.
mammals…
Niels Raes
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- 7
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Plotting 95% confidence intervals of log-log linear model predicted values
I fit length and weight data to a log-log linear model and created a regression line where the response has been back transformed to the original scale.
Next, I would like to add two lines to the scatterplot representing upper and lower 95%…
pomerler
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- 1
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How do I extend a linear regression plot in matplotlib
I've encountered a problem trying to fit a straight to linear part of my plot.
To finish my plot I have to extend the red line as if it were a straight, so that it's intersection with at least x axis can be observed.
My code is:
import…
happyRip
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- 1
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Plotting a log-log graph from Excel file
I tried to plot a graph by importing an Excel file to plot a log-log graph.
This was my code but it seems I'm not getting it right.
import matplotlib.pyplot as plt
import pandas as…
Dakon
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1 answer
How do I make this LogLog plot?
I am new to python and I am trying to create a LogLogPlot, similar to the one in the image below:
This plot, as can be seen on the top, is based on the equation y=x^2/(e^x +1).
I have found…
user7077252
- 135
- 6
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Checking lm() function
Why this is not the same?
y2=log10(Standards$`IL2 median`)
x2=c(0,log10(concentration[2:10]))
y2
[1] 2.495544 2.773055 2.982271 3.192567 3.668572 3.706974 4.151799
[8] 4.450357 4.776396 4.833561
x2
[1] 0.000000 1.301030 1.602060 1.903090 2.193125…
Baldrion
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- 1
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1 answer
Python 3 Derivative Approximation Errors with loglog plot
I need some help understanding this. I watched this YouTube video
(https://www.youtube.com/watch?v=q5pwy1NZqbM) that shows how to graph derivative approximation errors on a loglog plot. I get what the final graph shows, but I'm not sure what is…
user12419639
0
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0 answers
Plot major ticks on y-axis of loglog plot
I am trying to plot the major ticks on the y-axis of the loglog plot in matplotlib. The plot has ticks ($10^{0}, 10^{-5}, 10^{-10},...$) on the y-axis but I want to indicate the tick marks in between the intervals like for $10^{-1}, 10^{-2},…
math123
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How to set different colors lines in the loglog function?
I need a plot of 24 lines with different non-repeating colors. How to set different colors for lines (24 lines in total) in the loglog function using a matrix created with distinguishable_colors?
I get the error: Incorrect number assignment. Missing…
0
votes
1 answer
Logarithmic interpolation of Reynold numbers vs drag coefficient
The table shows the drag coefficient cD of a sphere as a function of
Reynolds number Re. Find cD at Re = 5, 50, 500, 5000. Hint: use
log–log scale.
Re 0.2 2 20 200 2000 20000
cD 103 13.9 2.72 0.800 0.401 0.433
I don't understand how to "use…
Ejjjn
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0
votes
1 answer
how to draw with matlab two seprate graphs with loglog?
i am trieng to draw with matlab the two functions :
y1=ln(n!) and y2=ln(n)*n
when n is a vector like this : n=1:100
i want to draw both of these functions in the same graph , and then draw another function : ((y2-y1)/y1) on a different graph .. i…
james
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- 7
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1 answer
Utility of loglog plots in curve fitting inverse square relationship
I have a a bunch of data that I'd like to use to find an unknown parameter in a physical equation.
I'm trying to find a parameter k to characterise the output of a hall effect sensor as a function on input voltage and distance between the sensor and…
Peiffap
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How can I extract data in a vector from semilogx figure?
How can I extract data in a vector from semilogx figure?
I am using bode plot to identify a system transfer function so I need the two vectors coming from semilogx graph to compare slope and identify system from approximate solution.
Is there any…
Rowida
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Draw a vertical line in matplotlib in a loglog plot
I want to plot a vertical line in my matplotlib loglog plot, but they line never shows up. I tried two methods and both fail. How do I do it?
So toy example:
import numpy as np
import matplotlib.pyplot as plt
N = 1000
r= np.random.randn(N)
x =…
patapouf_ai
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Finding the gradient and interception point in Matlab
I have a problem finding the interception point from a log-log plot in Matlab using the "least square method".
I have the following in Matlab:
a=[69.5;94.5;128.5];
b=[11.12;10.21;9.34];
loglog(a,b)
C=polyfit(log(a),log(b),1)
My objective is to find…
David
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