I have tens of thousands of images. I want to generate a histogram for each pixel. I have come up with the following code using NumPy to do this that works: I would like to know if anyone can help me vectorize the for loops? I can’t think of how to index into the perpix_hist array properly. I have tens/…
Tag: histogram
Dataframe, sum positive and negative value on specific date interval
here’s the context : I have 2 dataframes, one from a database that generate a one month series, and the second one is a download from another database, but on one year. I have make a plot where df1 and df2 are subtracted, creating a filled curve between, and I force the plot on just one month, so visual…
How to define breaks of the bins for log scale in Seaborn
Consider the following minimal working example: The minimal working example above will produce Now, let’s use our own breaks of the bins: I expected to produce a histogram similar to the one before but I’m getting What am I doing wrongly? Or is this a bug with Seaborn 0.11.2? Answer Apparently, yo…
In Python, how to overlap histogram graphs about data frame inside one panel?
I have a question about overlapping graphs inside one panel in Python. I generated numbers of two groups It works perfectly. However, if the data is the format of data frame, how can I make the same graph? For example, I simulated that I have two data set for different genotypes, cv1, cv2. In each data, grain…
Seaborn plot displot with hue and dual y-scale (twinx)
I am trying to plot the output from the predict of a ML model, there are the classes 1,0 for the Target, and the Score. Due the dataset is not balanced, there are few 1’s. When I plot a simple displot with the Target in the hue parameter, the plot is useless for describing the 1’s I want to change
Color bar limits doesn’t follow the data limits
I am trying to make plot with two 2d histograms. And i need them both to have a colorbar. But, i was able to plot the colobar at the lateral of one of these histograms, but as can see in the image below, the limits of the color bar doesn’t reflect the limits of the histogram. The bin with higher
Why can’t I plot image histogram’s in python-OpenCV
I have to get a image, apply Histogram equalization and plot the histogram of both images (original and modified). So I tried this code: But The plot returned is..: How can I fix it? Answer You are not creating a new figure, so the histogram is plotted on the last figure that displays the image. You may creat…
how to make histogram for multivariate data in python seaborn?
I have a following data I would like to have a histogram like the following but I could not do it using python. Can anyone please help me how to do it in python? Group Summer Winter Autumn Spring bacteria 20 30 40 20 virus 30 50 20 20 fungi 50 20 40 60 Answer You can transform the dataframe
Control the facecolor of histograms
In the following histogram, I would like to set two different colors for the bars of the histogram. There is a precedent question (this link), but the solution sets the bars’ colors in a range, e.g., bars 0 to 3 of one color. This is a different problem since I would like to differentiate two zones in t…
Matplotlib stacked histogram numpy.ndarray error
I am trying to make a stacked histogram using matplotlib by looping through the categories in the dataframe and assigning the bar color based on a dictionary. I get this error on the ax1.hist() call. How should I fix it? AttributeError: ‘numpy.ndarray’ object has no attribute ‘hist’ Re…