Introduction to Machine Learning:
What is Supervised Learning?
Author's note: This a high level, introductory piece aimed to introduce the core tenets of Machine Learning. For more technical pieces, please visit our blog.
Machine Learning is a hot topic, but it covers a huge range of applications — and with so many people are talking about it — it can be overwhelming to navigate, especially when you’re just starting out. So we put together this article as the first of three of the big schools of Machine Learning (ML)
These three are responsible for many of the innovations in Machine Learning in recent years — of which you’ve probably experienced but not realised.
Before we continue, a few comments on language used within this piece: “Learning” for an algorithm refers to training the algorithm on a data set until it achieves an acceptable degree of accuracy. What is acceptable will depend on various factors including the end application of the algorithm. For example, if one were training an algorithm to detect cancer, one would want the highest degree of confidence possible, to avoid needlessly stressing patients. On the other hand, if one were to train an algorithm to detect whether a picture contained a jar of jam or a lemon meringue pie, the stakes are much lower.
So, what is Supervised Learning?
When you use Supervised Learning (SL) algorithms, the algorithm is trained on labelled data. This is achieved with the help of training sets — data sets that are already labelled with a descriptor of some sort — which the algorithm uses to figure out how to get this answer. Then, when the algorithm encounters new, unlabelled data, it can use what it’s learnt to label the new data correctly. Or, if it doesn’t get it right, the training set ‘corrects’ it and the algorithm keeps learning. For example, in the case of the jam jar/meringue quandary posed earlier, we would have a data set of 10,000 photos. Half would contain jam, half would contain meringue. They would be tagged as such. We would take 9000 of the photos for training. The algorithm would “look” at each picture (Note — link to “How computer vision works”), and slowly it would be trained to detect each image. Once trained, if it were shown an unlabelled picture (from the 1000 we thoughtfully didn’t train it on), the algorithm would be able to output whether it thought the photo contained either a jar of jam or a lemon meringue pie, and a degree of confidence — expressed as a percentage.
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Contact details (i.e. your name, address, email, phone and facsimile details);
Information required for you to open an account with us or otherwise do business with us including bank account details, and any other relevant financial information; c information required as part of a recruitment process; d statistical information regarding the use of the Remi AI websites or
Apps, including website users' IP addresses and the dates and times of visits;
We usually collect personal information through:
When you submit information through the Remi AI websites or Apps, such as when you register a user account, retrieve log-in information, or request a new password;
When you submit an application form for a product provided by Remi AI;
When you submit information through information collection pages on the Remi AI websites;
When you register for subscriptions to mail outs (including via email), newsletters, updates, or other related information/publications through the Remi AI website(s) or App(s);
When we provide you with services. This may include us accessing information held by your financial institution or other third parties; when you use the Remi AI website(s) or App (s), in which case our system may automatically collect information relating to your visit to the Remi AI website(s) or App(s), such as your IP address;
When you contact us (through the Remi AI website(s) or App(s), via email or phone) with queries or issues or request that we, our content providers, or associates contact you; or h when you participate in our promotions or competitions.
If you do not provide us with the information we request, we may not be able to fulfil the applicable purpose of collection, such as to supply products or services to you or to assess your application for employment. Where practicable, we will collect personal information directly from you. We may also collect personal information about you from third parties such as your financial institution with your authorisation. If we receive information about you from someone else, we will take reasonable steps to ensure you are aware that we have collected personal information about you and the circumstances of the collection.
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Our main purposes for collecting, holding, using and disclosing personal information are the following:
To supply products or services to our customers;
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To carry out processes associated with the services we provide, including fraud screening, identity verification, electronic funds transfers and account monitoring;
To process and assess employment applications;
To enforce agreements between you and Remi;
To conduct competitions and trade promotions;
To comply with legislative and our policy requirements;
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To provide information to, and respond to queries from, shareholders or suppliers.
We generally explain at the time we collect personal information how we will use or disclose that information. We will only use or disclose personal information for a purpose other than for which it was collected or a related purpose if you have consented to such different use or disclosure or such use or disclosure is otherwise allowed by the Privacy Laws. In carrying out our business, it may be necessary to share information about you with and between our affiliates and organisations that provide services to us.
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We may disclose personal information outside of the jurisdiction from which it was collected. In the conduct of our business, we transfer to, hold or access personal information from various countries including Australia and the United States of America. The privacy laws of those countries may not provide the same level of protection as the privacy laws of the country from which the personal information was collected. However, this does not change our commitments to safeguard your privacy and we will comply with all applicable laws relating to the cross-border data disclosure.
We may use personal information you have provided to us to send you information about content available on the Remi AI website(s) or App(s), new or updated content, special offers, promotions or competitions or other items or material that you may be interested in. We may also share your personal information with our content providers for the same purposes. We will only contact you in this way if you have consented to receive such messages. If you are receiving promotional information from us and do not wish to receive this information any longer, please contact us directly, or use the unsubscribe facilities included in our marketing communications. If you have an account with Remi, we will use your personal information to send you messages containing important information about your account. These messages are an important part of the service that we provide to you and will be sent to you as long as you hold an account with us. Customers with an account cannot opt-out of receiving these messages.
We may provide your personal information to third parties who offer goods or services that you may be interested in. These third parties who may contact you directly in relation to those goods or services.
Our website privacy practices
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If you send us an application for a position, this information will be used to assess your application. This information may be disclosed to related bodies corporate and service providers for purposes such as:
Aptitude, psychological and medical testing; and
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As part of the application process you may be asked for your specific consent to the use and disclosure of certain personal information about any pre-employment medical examination or any aptitude or psychological testing. We may also ask you to consent to the disclosure of your personal information to those people who you nominated to provide references. A refusal to provide any of this information, or to consent to its proposed disclosure may affect the success of the application.
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If at any time you want to know exactly what personal information we hold about you, you are welcome to request access to your record by contacting us at Our file of your information will usually be made available to you within 21 days.
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We will endeavour to take all reasonable steps to keep secure any information which we hold about you, and to keep this information accurate, up to date and complete. Your information is stored on secure servers that are protected in controlled facilities. We require our employees and data processors to respect the confidentiality of any personal information held by us.
Retention of information
When we no longer need to use your information, or are no longer required to retain it by law, we will take steps to properly de-identify or destroy it.
If you have any concerns or complaints about how we handle your personal information, or if you have any questions about this policy, please contact us:
Remi Investing Pty Ltd Compliance Officer 81 Egerton Street, Silverwater, NSW, 2128
In most cases we will ask that you put your request in writing to us. We will investigate your complaint and will use reasonable endeavours to respond to you in writing within 30 days of receiving the written complaint. If we fail to respond to your complaint within 30 days of receiving it in writing or if you are dissatisfied with the response that you receive from us, you may have the right, depending on the jurisdiction, to make a complaint to the applicable regulator.