Update week34.do.txt
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@@ -14,9 +14,9 @@ lectures and questions and answers about the material to be covered
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every week. There are four groups, Tuesdays 815am-12pm and 1215pm-4pm
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and Wednesdays 815am-12pm and 1215pm-4pm. Please sign up as soon as
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possible for one of the groups. Max capacity per group is 30-40
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participants.
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participants. The labs are also available till 6pm Tuesdays and Wednesdays
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On Thursdays we have a regular lecture. These lectures start at 1215pm and end at 2pm.
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On Thursdays we have a regular lecture. These lectures start at 1215pm and end at 2pm and serve the aims of giving an overview over various topics.
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The first week we wtart with simple linear regression, a repetition of linear algebra and elements of statistics needed for the course.
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@@ -31,10 +31,11 @@ The first week we wtart with simple linear regression, a repetition of linear al
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!bblock
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For the reading assignments we use the following abbreviations:
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* GBC: Goodfellow, Bengio, and Courville, Deep Learning
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* GBC: "Goodfellow, Bengio, and Courville, Deep Learning":"https://www.deeplearningbook.org/"
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* CMB: Christopher M. Bishop, Pattern Recognition and Machine Learning
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* HTF: Hastie, Tibshirani, and Friedman, The Elements of Statistical Learning
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* AG: Aurelien Geron, Hands‑On Machine Learning with Scikit‑Learn and TensorFlow
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* KM: "Kevin Murphy, Probabilistic Machine Learning":"https://probml.github.io/pml-book/book1.html"
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Reading recommendations this week: Refresh linear algebra, GBC chapters 1 and 2. CMB sections 1.1 and 3.1. HTF chapters 2 and 3. Install scikit-learn. See lecture notes for week 34 at https://compphysics.github.io/MachineLearning/doc/web/course.html (these notes).
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!eblock
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@@ -667,9 +668,9 @@ The inverse of a matrix is defined by
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|----------------------------------------------------------------------|
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| $A=A^{T}$ | symmetric | $a_{ij}=a_{ji}$ |
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| $A=\left (A^{T}\right )^{-1}$ | real orthogonal | $\sum_k a_{ik}a_{jk}=\sum_k a_{ki} a_{kj}=\delta_{ij}$ |
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| $A=A^{ * }$ | real matrix | $a_{ij}=a_{ij}^{*}$ |
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| $A=A^{\dagger}$ | hermitian | $a_{ij}=a_{ji}^{*}$ |
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| $A=\left(A^{\dagger}\right )^{-1}$ | unitary | $\sum_k a_{ik}a_{jk}^{*}=\sum_k a_{ki}^{ * } a_{kj}=\delta_{ij}$ |
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| $A=A^*$ | real matrix | $a_{ij}=a_{ij}^*$ |
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| $A=A^{\dagger}$ | hermitian | $a_{ij}=a_{ji}^*$ |
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| $A=\left(A^{\dagger}\right )^{-1}$ | unitary | $\sum_k a_{ik}a_{jk}^*=\sum_k a_{ki}^* a_{kj}=\delta_{ij}$ |
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|----------------------------------------------------------------------|
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!eblock
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@@ -986,7 +987,7 @@ and many other operations.
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The _Series_ class is another important class included in
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_pandas_. You can view it as a specialization of _DataFrame_ but where
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we have just a single column of data. It shares many of the same features as _DataFrame. As with _DataFrame_,
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we have just a single column of data. It shares many of the same features as _DataFrame_. As with _DataFrame_,
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most operations are vectorized, achieving thereby a high performance when dealing with computations of arrays, in particular labeled arrays.
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As we will see below it leads also to a very concice code close to the mathematical operations we may be interested in.
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For multidimensional arrays, we recommend strongly "xarray":"http://xarray.pydata.org/en/stable/". _xarray_ has much of the same flexibility as _pandas_, but allows for the extension to higher dimensions than two. We will see examples later of the usage of both _pandas_ and _xarray_.
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