Recent content by EnglsihLearner

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    IGBT(Difference between n and n(+))

    Density of n is higher in n+ region and lower in n- while medium in n region.
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    Undergrad Sample mean and sample covariance

    Let xij be the ith independently drawn observation (i=1,...,N) on the jth random variable (j=1,...,K). These observations can be arranged into N column vectors, each with K entries, with the K ×1 column vector giving the ith observations of all variables being denoted xi (i=1,...,N). I have...
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    High School Finding the Sample Mean of a Matrix

    What is the sample mean of the following matrix?
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    Could someone me to read the following line

    Yes, I understand now. Could you please explain what does "map" mean here?As I know map means the following-...
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    Undergrad Is it possible one dimensional plane?

    I have heard about two or above dimensional plane which we can express R2 or Rn. But I never heard about one-dimensional plane which we can express R. Is it possible one dimensional plane?
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    Could someone me to read the following line

    Could someone please help me to read the following line(in case of inner product)?
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    Undergrad Linear Algebra: Understanding Matrix as a Linear Transformation

    The matrix is an example of a Linear Transformation, because it takes one vector and turns it into another in a "linear" way. Hi could you explain it what exactly the bold part suggest? What is "another in a "linear" way"?
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    Undergrad Difference between orthogonal transformation and linear transformation

    Thanks. I will back again after reading linear algebra. I am working on a topic called ECG(Electrocardiogram). I must understand PCA(Principal Component Analysis) to grasp ECG.I hope with your help I will be able to understand PCA. Thanks again.
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    Undergrad Difference between orthogonal transformation and linear transformation

    Perhaps I studied Matrix if it is linear algebra. And I think I understand what is vector space. Vector space: http://en.wikipedia.org/wiki/Vector_space Is it sufficient? I got the definition of both terms by wikipedia. But I don't understand clearly.
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    Undergrad Difference between orthogonal transformation and linear transformation

    When I start to learner PCA. I find the term "orthogonal transformation" unfamiliar. I google to to find the solution and I get anther unfamiliar term called "linear transformation". So I am unfamiliar with both the terms. I think if Can know the difference between them then it would be very...
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    Undergrad Difference between orthogonal transformation and linear transformation

    What is the difference between orthogonal transformation and linear transformation?