Tag Archives: matrix multiplication

Groupings, Shopping Lists, Vectors: part 15

This post is  part of a series, starting here, about models and ideas that underlie the rather abstract stuff called vectors and matrices in math textbooks.  In this series, we’ve looked at shopping lists, pricing out orders, weighted averages, perspective … Continue reading

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Groupings, Shopping Lists, Vectors: part 14

In the prior parts of this series, I have look at a number of problem situations from which a certain notion of grouping data and organizing data and operating on data arises straightforwardly, a way of grouping data that is … Continue reading

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Groupings, Shopping Lists, Vectors: part 13

In prior posts in this series we have seen two completely different kinds of applications for the idea of matrix multiplication: in part 11 we looked at pricing out an order, and in part 12 we looked at drawing a … Continue reading

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Groupings, Shopping Lists, Vectors: part 12

After the work we’ve done in prior parts of this series, e.g. part 11, to show vector inner products and matrix multiplication using an example of pricing out an order at a fast food place, I’d like to work through … Continue reading

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Groupings, Shopping Lists, Vectors: part 11

Let’s look some more at matrix multiplication, which we introduced in part 10 of this series.   We showed three rectangular arrangements, and called each a matrix, and called one the product of the other two.  (The accepted plural of matrix … Continue reading

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Groupings, Shopping Lists, Vectors: part 10

I’d like to revisit the price list from part 6 of this series for the fast food place, and revisit how the price list can be combined with an order to arrive at the total cost (ignoring taxes). As you … Continue reading

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