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Awarded to Tania on 20 Jul 2017
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Question
kfoldpredict do I understand it correctly?
Okay, I have built a crossvalidated regression tree. now i want to predict its accuracy for that i need the predicted value of y...
plus de 10 ans il y a | 1 réponse | 1
0
réponseQuestion
How does predict with ensemble regression works?
This might be a silly question...iam using bagging with regression trees. I built for instance 10 different trees, then I averag...
plus de 10 ans il y a | 1 réponse | 0
1
réponseQuestion
crossval with multiple linear model
Hey all, Currently, I am trying to build a crossvalidated linear model. I have started with the crossval function ... but I ...
plus de 10 ans il y a | 1 réponse | 0
0
réponseQuestion
Crossvalidation of liinear models?
Hi, does anyone knows if there is a function to crossvalidated my linear model? i can only find it for descision trees unfortu...
plus de 10 ans il y a | 2 réponses | 0
2
réponsesQuestion
plotResiduals looks for multivariant outliers or?
Hey all! Does anyone know if plotResiduals (like described here: <http://www.mathworks.co.uk/help/stats/linear-regression-mod...
plus de 10 ans il y a | 1 réponse | 0
1
réponseQuestion
Why do I get difference values doing this?-general syntax question
kfoldLoss(crossval(rtree2)) gives another value then the other kfold below: rtree3=(crossval(rtree2)); kfoldLoss(rtree3) ...
plus de 10 ans il y a | 1 réponse | 0
0
réponseQuestion
predict does not work with a crossvalidated tree?
Hey, I am trying to do the following: rtree = RegressionTree.fit(X,Y,'crossval','on'); pred = predict(rtree,X) But unfort...
plus de 10 ans il y a | 1 réponse | 0
1
réponseQuestion
Prepruning and postpruning regression tree
Hey! In the literature about decision trees they talk about pre-&post pruning. I was wondering if pre pruning could be com...
plus de 10 ans il y a | 1 réponse | 0
0
réponseQuestion
Decision tree why do I need to prune again although matlab has an automatic pruning included?
Hi! I would like to know why matlab recommends to prune again, although the function fitrtree already includes the function pru...
plus de 10 ans il y a | 1 réponse | 0
0
réponseQuestion
Warning iteration limit reached in robust regression - what does it mean?
Hey, in my multiple linear regression I get the following warning - what does it mean? Warning: Iteration limit reached. > ...
plus de 10 ans il y a | 1 réponse | 0
0
réponseQuestion
Which decision tree algorithm does matlab use for Regressiontree.fit?
Is it CART as described here http://www.mathworks.com/matlabcentral/answers/82505-what-decision-tree-learning-algorithm-does-mat...
plus de 10 ans il y a | 1 réponse | 0
0
réponseQuestion
Standardisation and measurement criteria
Hi everyone, Can anyone help me with this problem: I have used zscore to standardise my linear model with 3 predictor varia...
plus de 10 ans il y a | 1 réponse | 0
1
réponseQuestion
plot normal distribution plot on histogram of residuals
Does anyone know how to do that? Would be great if it could look like that: <</matlabcentral/answers/uploaded_files/15773/...
plus de 10 ans il y a | 1 réponse | 0
1
réponseQuestion
rotate tick labels in plot with property editor
Hey! does anyone know how to rotate the tick labels in the property editor? Thanks a lot!
plus de 10 ans il y a | 1 réponse | 0
1
réponseQuestion
plot diagnostics line unclear if mean leverage
hey! just a quick question: is the line in the plotDiagnositcs plot in the middle the mean average (coefficients/ number of o...
plus de 10 ans il y a | 1 réponse | 0
0
réponseQuestion
plotDiagnostics line mit average leverage in foreground
Hey! I have a problem with my average leverage line, you cant really see this line because a lot of my observation points are l...
plus de 10 ans il y a | 1 réponse | 0
0
réponseQuestion
Can I use mode for nominal data to calculate most frequent values
Hey! Is it possible to use mode for nominal data or is there something similar I could use to count my nominal data? Eg. I hav...
plus de 10 ans il y a | 1 réponse | 0
1
réponseQuestion
How can I change the scale of my boxplot
Hey! I have tried a few times, but somehow I can not change the y-axis scale of my boxplot. At the moment it has 1 2 3 ... x 10...
plus de 10 ans il y a | 2 réponses | 0
2
réponsesQuestion
Multiple linear model p value f test t test
Hi! I am a bit confused by the matlab documentation: Linear regression model: y ~ 1 + x1 + x2 + x3 *pVal...
plus de 10 ans il y a | 1 réponse | 0
1
réponseQuestion
Using fitlm for multiple linear model: Does this function automatically standardise the variables?
Hi! I just read about standardisation and that it is recommended to standardise variables in a multiple linear model. My qu...
plus de 10 ans il y a | 1 réponse | 0
1
réponseQuestion
Rsquare for regresstion tree
Hey! Does anyone know how I can calculate the rsquare for a regression tree? Thank you!:)
plus de 10 ans il y a | 2 réponses | 0
2
réponsesQuestion
Exclude more than one outlier in linear function
Hi, I would like to remove the values under -4.000.000 and over 2.000.000, but I get the following error message: >> outl = ...
plus de 10 ans il y a | 2 réponses | 0
2
réponsesQuestion
fitlm how to save predicted values?
Hey! For further calculations I need to use my predicted values of my linear model. Using fitlm I get e.g. mdl = Linear...
plus de 10 ans il y a | 1 réponse | 0
1
réponseQuestion
plotDiagnostics leverage how does it work
Hey! I have just the plotDiagnostics function (Statistics toolbox) and was wondering what the leverage on the Y means exactly? ...
plus de 10 ans il y a | 1 réponse | 0
0
réponseQuestion
fitlm - change the output of this function
Hey! When I use fitlm I always get the following measurement criteria displayed: Number of observations: Error degrees of...
plus de 10 ans il y a | 1 réponse | 0
1
réponseQuestion
Why is my resubLoss so high?
Hi, I have used the function rtree =RegressionTree.fit(X,Y), afterwards I have used the function resubLoss(rtree). I got a rea...
plus de 10 ans il y a | 1 réponse | 0
1
réponseQuestion
regression tree/classification tree, tree depth, dont understand synatx
Can someone explain me the following syntax (especially the one in bold), which is used in order to determine the optimal tree ...
plus de 10 ans il y a | 1 réponse | 0
1
réponseQuestion
Crossval and regressiontree.fit - how does crossval works?
Hey!:) I am using Regressiontree.fit in order to do build a decision tree for my data. If I want it to do cross validation auto...
plus de 10 ans il y a | 1 réponse | 0
1
réponseQuestion
Nominal variables for dummyvar
Hi! I have a cell array of postcodes. With “postcode=nominal;” I tried to transform it into a nominal variable as I want to cre...
plus de 10 ans il y a | 1 réponse | 0
0
réponseQuestion
fitnlm & dummy variables does not work
Hi all, Fitnlm allows automatic creation of dummy variables, if one input the categorical predictor as a nominal or ordinal arra...
plus de 10 ans il y a | 1 réponse | 0
0
réponse
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