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Thread: from numpy array to csv - rounding
Post: RE: from numpy array to csv - rounding
| (Nov-14-2022, 08:25 PM)deanhystad Wrote: Curious though, why do you want to round floats to 3 digits in a csv file? It's not like csv is a presentation format.
I want to lose precision so that the ... |
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SchroedingersLion |
General Coding Help |
6 |
2,164 |
Nov-14-2022, 08:52 PM |
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Thread: from numpy array to csv - rounding
Post: RE: from numpy array to csv - rounding
| Thank you, you two!
I just found another way. Apparently, numpy offers a rounding function for their arrays, so one can just call
ARR.round(decim)where ARR is a numpy array to be rounded to decim si... |
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SchroedingersLion |
General Coding Help |
6 |
2,164 |
Nov-14-2022, 07:08 PM |
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Thread: from numpy array to csv - rounding
Post: from numpy array to csv - rounding
| Greetings,
I have a 2D numpy array ARR storing a bunch of floats. I want to print it row by row to a .csv file, but rounded to 3 significant digits.
Is there a simple way to do this?
This is what I c... |
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SchroedingersLion |
General Coding Help |
6 |
2,164 |
Nov-14-2022, 05:33 PM |
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Thread: matplotlib x-axis wrong order
Post: RE: matplotlib x-axis wrong order
| Thanks guys!
The thing is that the second half of my batches are batches from a following epoch. Earlier in the document, they were labelled from 0 to 134 again, which is why I would like my x-axis t... |
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SchroedingersLion |
General Coding Help |
4 |
4,254 |
Feb-23-2021, 05:11 PM |
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Thread: matplotlib x-axis wrong order
Post: matplotlib x-axis wrong order
| Greetings!
I would like to create a simple 2D plot of 270 data points.
batchnrs = list(range(0,135))*2
plt.plot(batchnrs, loss_per_batch, label="loss")
plt.show()However, the x-axis in the plot does... |
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SchroedingersLion |
General Coding Help |
4 |
4,254 |
Feb-18-2021, 03:59 PM |
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Thread: append list to empty array
Post: RE: append list to empty array
| I found the solution: One has to specify axis=0 in order to get what I want, otherwise the arrays are flattened before appending is performed.
X_y_disch = np.append(X_y_disch, [[k for k in B1_B2[keys... |
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SchroedingersLion |
General Coding Help |
1 |
2,169 |
Feb-02-2020, 05:29 PM |
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Thread: append list to empty array
Post: append list to empty array
| Hello guys,
I would like to know why the following does not give me an Nx7 array.
X_y_disch = np.empty((0,7), float)
for keys in B1_B2:
X_y_disch = np.append(X_y_disch, [[k for k in B1_B2[keys][... |
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SchroedingersLion |
General Coding Help |
1 |
2,169 |
Feb-02-2020, 01:57 AM |
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Thread: inserting something into probability density
Post: inserting something into probability density
| Hi guys,
I need to insert a vector X into the multivariate normal distribution (WIKI), and get its value.
I know that numpy offers sampling from this distribution, but can I also insert a vector and... |
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SchroedingersLion |
Data Science |
1 |
2,116 |
Jan-05-2020, 11:15 PM |
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Thread: change array elements dependent on index
Post: change array elements dependent on index
| Greetings,
is there an easier way to write the following with some kind of slicing arithmetics?
for k in range(1, N-1):
A[k] = some_function(k) * some_array[k]where A and some_array are numpy ar... |
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SchroedingersLion |
General Coding Help |
1 |
2,205 |
Nov-21-2019, 09:52 PM |
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Thread: zooming in pyplot window
Post: zooming in pyplot window
| Hi guys,
I am a bit confused by the axis labeling that appears when I zoom-in in a typical 2D plot window.
Suppose I am in the region of x<0. I zoom in again and again. Of course, the units of the... |
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SchroedingersLion |
Data Science |
0 |
2,196 |
Aug-02-2019, 02:59 PM |
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Thread: reading in csv row by row
Post: RE: reading in csv row by row
| Guys, please...
I want to use csv reader to read in my data as stated. I am in a deep hurry and I don't have the time to think about the equivalency of different implementation methods. I have learne... |
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SchroedingersLion |
Homework |
9 |
5,645 |
Jan-08-2019, 10:47 PM |
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Thread: reading in csv row by row
Post: RE: reading in csv row by row
| (Jan-08-2019, 07:18 PM)woooee Wrote: Using csv.reader only complicates this IMHO ## obviously we don't have this file, so this is untested code
x_training = []
y_training = []
data = open(csv_file... |
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SchroedingersLion |
Homework |
9 |
5,645 |
Jan-08-2019, 07:23 PM |
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Thread: reading in csv row by row
Post: reading in csv row by row
| Good evening,
can someone help me with the syntax in saving the rows of a csv files with M rows and N columns into a list?
I do not want the last column, but all of the M rows.
Thus, the list should ... |
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SchroedingersLion |
Homework |
9 |
5,645 |
Jan-08-2019, 07:01 PM |
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Thread: writing numbers to csv file
Post: RE: writing numbers to csv file
| Thank you, I will give it a try this afternoon! |
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SchroedingersLion |
General Coding Help |
7 |
4,045 |
Dec-19-2018, 12:53 PM |
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Thread: writing numbers to csv file
Post: RE: writing numbers to csv file
| (Dec-19-2018, 11:33 AM)buran Wrote: with open(outputname, mode='w') as csv_output:
result_writer=csv.writer(csv_output, delimiter=" ")
# option 1
for nums in zip(x2, y2):
... |
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SchroedingersLion |
General Coding Help |
7 |
4,045 |
Dec-19-2018, 12:31 PM |
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Thread: writing numbers to csv file
Post: writing numbers to csv file
| Greetings,
can someone tell me wether the following is correct?
I have float values stored in two lists, namely x2 and y2.
I want to print a csv file with delimiter " ", in which the i-th element of ... |
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SchroedingersLion |
General Coding Help |
7 |
4,045 |
Dec-19-2018, 10:51 AM |
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Thread: draw sample from distribution in interval
Post: RE: draw sample from distribution in interval
| Ah, I got my error. Aside from my inexperienced Python coding, my mathematical method was flawed. |
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SchroedingersLion |
Homework |
2 |
2,471 |
Oct-28-2018, 10:23 PM |
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Thread: draw sample from distribution in interval
Post: RE: draw sample from distribution in interval
| from scipy.stats import beta
n=10000 #sample sizes
sample_theta1=[beta.rvs(91,11) for x in range(n)]
beta_values_theta1=beta.pdf(sample_theta1,91,11)
summands_total_integral=[]
sample_theta2=[]
beta... |
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SchroedingersLion |
Homework |
2 |
2,471 |
Oct-28-2018, 03:46 PM |
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Thread: draw sample from distribution in interval
Post: draw sample from distribution in interval
| Greetings,
I am trying to numerically calculate a double integral over probability distributions (beta distributions), see picture.
I want to approximate the integrals as sums, taking samples accordi... |
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SchroedingersLion |
Homework |
2 |
2,471 |
Oct-28-2018, 02:32 PM |
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Thread: dividing by list not possible?
Post: RE: dividing by list not possible?
| Thank you guys! Almost forgot about the thread, sorry!
@volcano63
So if I want to use these elementwise array operations, I have to make sure that I am using an actual "numpy array" and not the stand... |
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SchroedingersLion |
Data Science |
5 |
3,813 |
Oct-11-2018, 09:00 AM |
